There is a limit to one’s life，but there's no limit _________the people．

A．to serve          B．to serving           C．serving                D．of serving

一You ought to have warned him of the danger．

—_________．But．he wouldn’t listen to me．

A．So ought you           B．So did I            C．So I did            D．So I ought

一I think you should phone Jenny and say sorry to her．

一________．It was her fault．

A．No way          B．Not possible               C．No chance              D．Not at all

When and where to go for the on-salary holiday _______yet．

A．are not decided                                        B．have not been decided

C．is not being decided                                 D．has not been decided

Tom often has to be called several times _______he comes downstairs for dinner．

A．before          B．until              C．when            D．then

If _____ where I am，you’ll say I have gone calling on a friend．

A．asking              B．you’ll be asked           C．they are asking you           D．asked

_______science and technology_______ so fast，it is quire necessary for us to have a good knowledge of English and computer．

A．For；developing                                      B．With；developing

C．As；develops                                          D．With；developed

We must ________measures to protect our earth from ________．

A．do；being polluted                                   B．get；polluted

C．take；being polluted                                   D．have；polluted

It makes no ______to me ________you will come or not．

A．use；whether                                          B．good；if

C．difference；whether                                       D．importance；if

This kind of book usually ________well, but this time not many copies _______．

A．sell；have been sold                          B．is sold；have sold

C．sells；have been sold                                 D．sells；are sold out