He found the manager _____ by letters and papers and _____ very worried.

The dangerous virus ____ in the next few weeks in the laboratory can cause fatal diseases.

Jane has been so ______ in getting used to everything that she hasn’t had time for social activities.

Though trying really hard, they acknowledged ____ at last.

A serious earthquake struck the village, __________ many people homeless.

______ more effectively in the future, many people equip themselves with further education.

After________ by the police for several days, the robber had to give in.

—What is your plan for the holiday?
—I’d like _______the days with my family ________climbing.

Although a teenager, Yuanyuan could resist ________ what to do and what not to do.

I would sooner ________ the chance, which is not easily taken, than ________ my friend.