1.We've been waiting for the hours to see famous pop singer, but the airplane______ behind the timetable.
A.must be
B.will be
C.would have been
D.must have been
2.The chief reason for the population growth isn't so much a rise in birth rate______ a fall in death rates as a result of improvement in medical care.
A.and
B.as
C.but
D.or
3.It was a bad idea to buid a power sation in the deep valley, but it______ as well as we had hoped.
A.came off
B.went off
C.brought out
D.made out
4.Just as the value of a telephone network increases with each new phone______ to the system, so does the value of a computer system increase with each program that turns out.
A.adding
B.to have added
C.to add
D.added
5.It;s ture that the old road is less direct and a bie longer. We won't take the new one,______, because we don'tfeel as safe on it.
A.somehow
B.though
C.therefore
D.otherwise
6.______, more than 200 houses and buildings are heated by solai energy, not to mention the big cities.
A.Alone in the small town
B.In the small alone town
C.In the alone small town
D.In the small town alone
7.The Olympic Games, first celebrated in Athens in 1896,______every four years so far this century, except during the two world wars.
A.are held
B.were held
C.have been held
D.had been held
8.---They don't have much furniture in their house yet.
---______they're planning to live here only until Bob gets his degree, they don't want to buy much furniture.
A.While
B.Since
C.Although
D.As long as
9.The long lasting war, fillde with blood and deaths, ended in people's sadness, ______no result.
A.reached
B.to reach
C.woule reach
D.reaching
10.It was an unforgettable moment for all the citizens this year,______in 20 years China'swomen'svolleyball team won the Olympic gold medal again.
A.that
B.which
C.when
D.while
答案是DBADB DCBDC
麻烦大家给详细解释一下,谢谢
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