Ⅰ。 用适当语法形式或词汇填空。从A、B、C和D四个选项中选出一个最佳答案，并填在答题纸相应的位置上。（本大题共30小题，每小题1分，共30分）
1.It is ______________ problem that few people can solve it.
A.such difficult a
B.such difficult
C.so difficult a D.so difficult
2.You’d better be more careful with your work，______________？
A.would you B.wouldn’t you
C.had you D.hadn’t you
3.Till then， John ______________ from his sister for about half a year .
A.hadn’t heard B.didn’t hear
C.hasn’t heard D.won’t have heard
4.I hear that all those houses in the street _______________ by the time you come back.
A.will pull down B.will have been pulled down
C.will be pulled down D.will have pulled down
5.It is essential that your application form _______________ back before the deadline.
A.must be sent B.would be sent
C.be sent D.will be sent
6.Mrs. Brown is considering _______________ the house before the prices go up.
A.buying B.of buying
C.to buy D.about buying
7.No sooner had Mary arrived at the station ________________ the train left.
A.until B.then
C.when D.than
8.The new highway in the area is reported ________________ within four years.
A.completing B.to have completed
C.having been completed D.to have been completed
9.The question _______________ at present is of great importance to us.
A.to discuss B.being discussed
C.discussed D.to be discussed
10.The situation today is quite different from _______________ it was ten years ago.
A.which B.that
C.what D.when
11.I will fly to Shanghai tomorrow morning， _______________ I plan to stay for three days.
A.where B.there
C.which D.in the city
12.Jack went to town yesterday and had his bicycle _______________ there.
A.to repair B.repairing
C.repair D.repaired
13.Not until Peter got home _______________ that he had lost his keys.
A.did he realize B.he realized
C.had he realized D.he had realized
14._______________ night that I could hardly fall asleep.
A.So cold was it last B.So cold was it
C.So cold it was last
