Joining Clauses · 20 Questions

In 1928, Scottish scientist Alexander Fleming returned from a vacation and found mold growing in one of his laboratory ______ the mold, the bacteria he had been studying had died.

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

NASA’s Curiosity rover landed in Gale Crater on Mars in ______ soon began studying rocks for signs of ancient water.

Unlike human eyes, an owl’s eyes cannot move within their ______ the bird turns its whole head to look around.

Although the museum has only three ______ holds one of the largest collections of ancient coins in the region.

Sea otters often wrap themselves in long strands of ______ seaweed keeps the otters from drifting away while they sleep.

Some desert plants store water in their thick ______ survive for months without rain.

The first Olympic Games of the modern era were held in Athens, Greece, in ______ about 240 athletes from 14 countries took part.

Many students feel more alert in ______ have eaten a good breakfast.

Honeybees tell one another where to find flowers by performing a movement called the waggle dance. The angle of the dance shows the direction of the ______ length of time each waggle run lasts shows how far away they are.

Architect Zaha Hadid became known for buildings with sweeping curves. At first, many critics said that her designs could never be ______ many of them now stand in cities around the world.

Because tree frogs have sticky pads on their ______ can climb smooth surfaces such as glass.

A study showed that a solar park caused nearby land to cool, though the ecological impact of this temperature decrease isn’t yet known. Before the park’s construction, the surface temperature 30 meters outside of the park boundary was 0.1°C cooler than that of a control ______ construction, the temperature 30 meters outside of the boundary was 1.7°C cooler than that of the control area.

Marine biologist Sylvia Earle has led more than one hundred ocean ______ spoken out for the protection of marine habitats.

After the river floods each ______ plant crops in the rich soil that the water leaves behind.

The Great Wall of China was not built all at once. Different dynasties added new sections over many ______ best-preserved parts that visitors see today were built during the Ming dynasty.

Botanists classify tomatoes as fruits because they develop from a flower and contain ______ most cooks treat them as vegetables.

Humans were long thought to have begun occupying the Peruvian settlement of Machu Picchu between 1440 and 1450 CE. However, a team led by anthropologist Dr. Richard Burger used accelerator mass spectrometry to uncover evidence that it was occupied ______ 1420 CE, according to Burger, humans were likely inhabiting the area.

Painter Frida Kahlo often used the bright colors of Mexican folk ______ included symbols from ancient Mexican cultures in her self-portraits.

In modern plays, actors typically won’t acknowledge the ______ do so breaks the fourth wall, a metaphorical barrier between actors and audiences that allows viewers to suspend the knowledge that they’re watching a staged performance.