---Who is the tallest boy? ---It ______ be John. John is of medium height.
| A．must | B．needn’t | C．might | D．can’t |
Mr. White is my English teacher. He ______ in this school for about 5 years.
| A．has worked | B．will work | C．is working | D．works |
After he finished ______ the exciting story, he talked about it on and on with his friends.
| A．reads | B．read | C．reading | D．to read |
— ______ did you visit the Great Wall?
— Last Sunday.
| A．Where | B．What | C．When | D．How |
Roast duck is one of _______ dishes in Beijing.
| A．delicious | B．more delicious | C．most delicious | D．the most delicious |
I’d like to go swimming with you, ______ I am too busy today.
| A．but | B．and | C．so | D．or |