1 . Sometimes policemen wear plain clothes to ________ ________ (执行) special work.

2 . Kevin did best in the cube game. He always has a clear head to ________ different tasks.

A．wait for

B．carry out

C．depend on

3 . —Look! The students are so interested in the lesson given by that fireman.
—Oh, the fireman is showing them how to use extinguishers (灭火器) to _______ fires.

A．put out

B．work out

C．carry out

D．find out

4 . Dabai wore protective clothing to ________ nucleic acid testing in the past three years.

A．carry out

B．put on

C．think over

5 . For students, good health ________ proper exercise, enough sleep and happy mood.

A．decides on

B．depends on

C．carries out

6 . Sally has a poor sense of direction and always ________ GPS while driving.

A．depends on

B．carries out

C．decides on

7 . —Can you lift this box?
—It _________ how heavy it is.

A．depends on

B．carries out

C．works out

8 . To deal with the aging population, China has ________ the three child policy.

A．carried on

B．carried out

C．worked on

D．worked out

9 . John isn’t a man of his words. His failure to ________ his promise has let every one of us down.

A．carry out

B．find out

C．cut out

D．put out

10 . 除非你控制好情绪，否则我们不会开展这项计划。
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