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— Let’s ask our teacher for help.

A. what to do B. what should I do

C. how to do D. how I should do

A. go B. to going C. to go D. going

一Yes，but I love air after the rain. It smells so fresh.

A. the; a B. a; the C.the; the D. a; a

A. that there is going to be

B. if there is going to be

C. whether is there going to be

D. whether there is going to have

A. has begun B. has been on

C. had begun D. begun

A. thin B. rich C. poor D. healthy

A. must B. can't C. couldn't D. Mustn't

--- He be in the playground because he likes playing basketball.

A. will B. could C. can't D. mustn't