25、I         have gone the concert because I know nothing about that kind of music.

A．couldn’t          B．mustn’t           C．shouldn’t               D．oughtn’t

24、To prevent cyber crime more efficiently, it is important to make new laws and create international standards for them similar to     concerning international airspace.

A．that          B．what           C．one          D．those

23、The disease,       , could spread very fast.

A．unless well controlling                                 B．if not well controlled

C．when not to control                                    D．although not being well controlled

22、—Is your school bigger than ours?

—Yes. I guess it is      your school.

A．as twice the size of                                      B．as two thirds big as

C．bigger than half                                                 D．one third bigger than

21、—It’s so nice to enjoy the sunshine here on the green grass.

—You      us a right place.

A．had introduced       B．are introducing          C．have introduced         D．introduce

20、If you sleep short of 7 hours, you are three times   ______to catch a cold.

A．possible          B．certainly           C．probable         D．likely

19、They finally reached      they had long dreamed of.

A．where            B．the place            C．that          D．there where

18、—Can we fix a time for the party?

—We can’t have the party      none of us have any classes.

A．except           B．except for           C．except when        D．except that

17、Distinguished guests and friends, welcome to our school!       the ceremony of the 50^th anniversary this morning are our alumni (校友) from home and abroad.

A．Attend           B．To attend           C．Attending          D．Having attended

16、The captain gave an order in the difficult situation     the sailors throw away everything that was on board the ship.

A．what         B．which            C．as           D．that