________ a precious diamond necklace for his wife, Martin could hardly afford a tie for himself．
A． Having bought B． Buying
C． Being bought D． To buy
____ I say Clancy is a smart boy, he still needs to work hard to achieve his goal．
A． Then B． When C． While D． As
She ___ volleyball regularly for many years when she was young．
A． was playing B． played
C． has played D． had played
I really appreciate ____ to help me with my maths, but I’m afraid that I have no time this week．
A． you to offer B． it you offer
C． your offering D． this you are offering
_____ all my teachers, Mr． Moore is the one who impresses me most．
A． At B． On C． To D． Of
Unfortunately, ____ stone hit him on ______ head and he got injured．
A． the; a B． a; 不填 C． a; the D． the ; the
