Clauses and Conjunctions · 30 Questions

While some bakeries in Paris still bake bread in wood-fired ______ now use modern ovens that are easier to control.

Farmers in the valley plant long rows of trees along the edges of their ______ the trees slow the wind that would otherwise dry out the soil.

An octopus can change the color of its skin in less than a ______ in its skin contain tiny sacs of colored pigment that can be stretched or squeezed.

Newly hatched sea turtles crawl across the sand toward the ______ swim out to deeper water as soon as they reach the waves.

Although the steep trail to the top of the mountain is only four kilometers ______ takes most hikers about three hours to reach the summit.

The school's old computers could no longer run the new design ______ art teacher asked the principal for money to replace them.

Many flowers close their ______ the sun goes down and the air begins to cool.

Visitors to the lakeside museum can see a wooden fishing ______ local families used on the lake more than two hundred years ago.

Nearly all the streets in the old part of town are too narrow for large ______ is only one road wide enough for a city bus.

If a honeybee colony loses its ______ can raise a new one by feeding a young larva large amounts of a special food called royal jelly.

A city counted the cyclists on one of its main streets before and after it built a protected bike lane. Before the lane's construction, the average number of cyclists passing the public library on a weekday morning was about ______ construction, the average number of cyclists passing the same spot on a weekday morning was about 520.

The town library will keep its main reading room ______ workers finish repairing the leaking roof.

The members of the neighborhood garden club gathered the fallen ______ turned them into compost for the spring planting.

When free public libraries spread across the United States in the late nineteenth ______ who could not afford to buy books could borrow them at no cost.

Penguins cannot fly through the ______ strong, flipper-like wings let them move quickly through the water.

The museum moved the old painting into a darker ______ strong sunlight had begun to fade the painting's colors.

The ______ discovered a new species of tree frog spent three years exploring the rainforests of Ecuador.

Some desert lizards almost never drink from pools or ______ get most of the water they need from the insects that they eat.

Since the mountain road was too narrow for two trucks to pass each ______ had to take turns driving through the steepest section.

The city closed the old bridge for two ______ engineers needed time to repair the cables that hold up the road.

The baker mixes the dough early in the ______ lets it rise for several hours before shaping the loaves.

In 1903 the first flight of the Wright brothers' powered airplane lasted just twelve ______ in 1905 their improved airplane flew for nearly forty minutes.

Unless it rains heavily on Saturday ______ school's soccer final will be played that afternoon.

Astronauts practice spacewalks for many hours in a giant swimming ______ they travel to the International Space Station.

Earth has only one natural ______ are more than one hundred moons orbiting the planet Saturn.

After the volcano on the island erupted last ______ thick layer of ash covered the nearby fields for several weeks.

Visitors to the national park can hike to the top of the ______ can ride a small train that climbs the mountain's eastern side.

Last spring the students planted vegetables on a strip of ______ they had cleared of rocks and weeds.

The old lighthouse on the island stopped guiding ships in ______ now attracts thousands of visitors every summer.

In the 1800s, mules walking on a path beside the Erie Canal pulled boats through the ______ the 1920s, boats with engines had replaced most of the mule-drawn boats on the canal.