_______ was known to them all that William had broken his promise ______ he would give each of them a gift.

A. As; WhichB. What; that   C. It; that D. It; which

The ___ look on his face showed that he hadn’t expected it .

A. astonished   B. astonishing   C. being astonished   D. having astonished

___ from space, the earth with water ___70％ of its surface looks like a "blue blanket".

A. Seen; covered    B. Being seen; covers     C. Seeing; covering  D. Seen; covering

____ more attention, the trees could have grown better.

A. Given       B. To give     C. Giving          D. Having given

Someone is ringing the doorbell. Go and see ______ .

A. who is he B. who he is    C. who it is    D. who is it

_________ I will visit Brazil during the 2016 Olympic Games.

A. If I am possible B. If it possible  C. If I possible  D. If possible

___________, I have never seen anyone who’s as wise as John.

A. As long as I have traveled     B. Now that I have traveled so much

C. .As I have traveled so much       D. Much as I have traveled

You can make yourself _____ in English pretty well if you keep on speaking the language.

A. understand    B. understanding    C. to understand   D. understood

With dinner _____, the lady went on ____ some sewing.

A. to prepare; to do B. preparing; doing   C. prepared; to do  D. to be prepared; doing

______ you come across some new words, don’t refer to your dictionary at once but guess their meanings according to the context.

A. Every time   B. The first time     C. Now thatD. If only