________ all his savings gone, he had to start looking for a job．

A．For

B．With

C．As

D．Because

He ________ a book about America last year but I don’t know whether he has finished it．

A．has written

B．was writing

C．had written

D．wrote

________, people are beginning to realize how serious the situation is．

A．Fortunately

B．Being fortunate

C．Unfortunately

D．Being fortunately

________ between the floors, the lift couldn’t work．

A．Having trapped

B．To trap

C．Trapped

D．Trapping

Venus and Serena Williams sometimes have to ________ each other in a tennis tournament．

A．compete with

B．compete in

C．competing for

D．be competing against

He says he will come to the party ________ he isn’t invited．

A．until

B．unless if

C．whether

D．even if

The waters of the lake were so ________ that it looked like glass．

A．still

B．quiet

C．calm

D．silent

－We haven’t heard from Zhang Ping for a long time．

－What do you suppose ________ to her?

A．was happening

B．has happened

C．having happened

D．was happened

He found a girl ________ in the river when he ________ along it．

A．struggle; walked

B．struggling; was walking

C．struggled; had walking

D．had struggled; was walking

So difficult ________ it to work out the problem that I decided to ask Tom for advice．

A．I did find

B．did I find

C．I have found

D．have I found