As is natural, a man as old as he ________ be very forgetful．

A．can

B．should

C．would

D．must

We are a little worried because we ________ ground as a leader in the field of IT with the others speeding up development．

A．have lost

B．lost

C．are losing

D．were losing

The problem came up at the meeting ________ we had not got enough money to do the research．

A．whether

B．if

C．that

D．what

－Is Tom still performing?

－I’m afraid not．He is said ________ the stage already as he has become an official．

A．to have left

B．to leave

C．to have been left

D．to be left

－Is that the middle school you often refer to?

－Right, just the one ________ you know I used to study for years．

A．that

B．which

C．where

D．what

After two hours of hard fighting, the northern army won the ________．

A．enemy

B．force

C．war

D．battle

We’ve been looking at the houses but haven’t found ________ we like yet．

A．one

B．ones

C．it

D．them

－Wow, you look good．Your hair looks fantastic．You’re such a wonderful friend．You’re so generous．I’ve always liked you．

－________!Get to the point．I haven’t got all day．

A．Enough

B．Thanks

C．Really

D．Again

He has much difficulty in learning English; ________, he isn’t discouraged．

A．so

B．and

C．or

D．however

－I have never seen a squirrel．

－So you cannot have any idea ________ a happy thing a squirrel is．

A．that

B．how

C．which

D．what