20、The thick mist _____ gradually as the sun rises．

A．passes out                                                B．passes on

C．passes off                                                D．passes away

19、I was laid off last month so ______ I borrowed some money in my life

A．first time                                                  B．for the first time

C．the first time                                              D．by the first time

18、We have planted a lot of trees to _____ wind and sand in the desert．

A．hold up                                 B．hold down

C．hold back                              D．hold out

17、_______ I admit the problem is very serious, I don’t think it can’t be solved．

A．While           B．When          C．As          D．Because

16、Since the economic crisis, most of the American people have______ their living expenses．

A．cut up          B．cut down         C．cut off               D．cut in

15、Who would you rather ____ with you to the cinema?

A．have go                                       B．have to go

C．love to go                                    D．like to go

14、We should help people in difficulty _____ their color and nationality．

A．in spite of                                           B．regardless of

C．in regard to                                        D．despite

13、I am so tired．_____ I could take the day off tomorrow．

A．Only if           B．If only          C．Only too       D．What if

12、As we all know, eating too much fat can ______ heart disease and cause high blood pressure．

A．add to           B．attend to         C．contribute to          D．apply to

11、His father was the first on the farm ______ against the slave owner．

A．fought         B．fighting         C．to fight          D．having fought