Câu hỏi:  I’ve never seen such a big ______ of feet!

A. size

B. pair

C. set

D. couple

Câu 1: Can you possibly make ______ what he has written here?

A. for

B. up

C. out

D. up for

Câu 2:  The deep pool was so brown and weed-covered that it was almost ______.

A. opaque

B. transparent

C. solid

D. invisible

Câu 3:  Suddenly the crowd _____ and moved back, and the police pushed through.

A. parted

B. halved

C. doubled

D. departed

Câu 4:  This blue door was _____ painted green.

A. lastly

B. firstly

C. originally

D. presently

Câu 5:  Because of the fine weather, we had all our classes in the ______ air.

A. full

B. clear

C. open

D. outside

Câu 6: The child enjoyed _____ up the wooden bricks then knocking them down.

A. adding

B. pushing

C. piling

D. forming