You ________ open the door before the train gets into the station.

A. don't have to

B. needn't

C. may not

D. mustn't

She likes to______ a white uniform to go to work.

A. put on

B. take off

C. wear

D. wearing

Li Lei can't go hiking with us today, because he ________ take care of his sick mother.

A. has to

B. may

C. mustn't

D. needn't

?Do you still remember ________ me somewhere in Shanghai?

?Yes, of course. Two years ago.

A. to see

B. see

C. seeing

D. saw

How many months ________ there in a year?

A. is

B. are

C. will be

D. were

Mr Brown enjoys ________ after his flowers after work.

A. looked

B. to look

C. looking

D. look

They ________ all the time.

A. run and jump

B. ran and jumped

C. are running and jumping

D. are running and jump

You can find many people ________ with their pets in the street.

A. walk

B. walked

C. were walking

D. walking

Who ________ you just now? Is it Mr Hu?

A. telephone

B. telephoning

C. telephones

D. telephoned

My mother told me she ________ two new books for me.

A. had bought

B. buys

C. bought

D. buy