As soon as the criminal saw the police approaching, he ran away and ____ into the crowd.

After learning that Mr. Grant stored some gold bricks in his basement, the young men ____ together to break into his house.

Some twenty experts in this field _____ this research team. These members aimed to find a cure for the fatal disease.

I bought this cheap watch yesterday, but it doesn’t keep very ____ time.

With the ____ of medical treatment, modern people can live longer than the people in the past.

Without effective long-term protection, such endangered animals as tigers could disappear from their natural ____ within the next decade.

The bird watchers are looking forward to the annual _____ of black-faced spoonbills (黑面琵鷺) in winter.

Computers are able to process ____ amounts of data in mere seconds.

Salt, sugar, and oil shouldn’t be ____ too much if one wants to stay away from cardiovascular disease (心血管疾病).

The outbreak (爆發) of the disease was on such a large ____ that the government is taking several measures to prevent it from spreading so quickly.

The boxer was knocked unconscious and couldn’t be ____ for almost 20 minutes. Therefore, he was rushed to the hospital for emergency treatment.

These kinds of dinosaurs used to live in caves because some of their ____ have been found to support it.

The government have stated that construction of the heavy metal factory will not be allowed to ____ until preventive measures are taken to reduce the possible impacts on the local environment.

A flock of birds ____ in the forest, and people wondered what happened to them.

Scientists have discovered some living ____ that are able to live under extremely high temperature.

The illiterate (文盲) can not read, ______.

Some scientists are trying to revive animal species _____ no longer exist in the world.

I could not hear what ______ because the classroom was really noisy.

There is no _____ when the Ebola virus will be completely controlled and stop spreading.

The political party lost the election and this _____ its leader to step down to take the responsibility.

Some students think that happiness arises from getting along well with friends, while ____ think that it lies in learning new things every day.