20、----Jack promised to come on time, but he hasn't arrived．

----What do you imagine ____ to him then?

A．happening            B．had happened            C．has happened         D．happened

19、Couldn’t believe a boy three years younger than me had completed so much,          ?

A． hadn't he            B． couldn't I            C． could I                   D． had he

18、Though it's warm here all the year round, it        be quite cold at night some-times.

A． can            B． shall         C． must           D． need

17、        your best, I think, and the problem could be settled．

A． If you try        B． To try         C．Try         D． Trying

16、-- What's the weather like tomorrow, John?

--Well, I       it, for the pictures drew my attention as the weather forecast was going on.

A． was missing          B． missed          C． will miss           D． had missed

15、She'll turn up at any time that happens to       her.

A． fit         B． meet         C． suit             D． match

14、        Skiing may not be so developed in the area, people still head there for excitement and fresh air.

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

13、      with the new machine, a search party went into the cave hoping to find buried treasure.

A．Being armed            B．To be armed             C．Armed             D．To arm

12、I like this skirt better than that one, but it costs almost twice      .

A． as much           B． as many                   C． so much            D． so many

11、---- We have decided to go outing tomorrow, join us?

 ----Well,       you are going, so will I.

 A． when        B． since         C． if        D． while