填空题There is
a
delicate balance of nature
which
many square miles of ocean and vegetation and clean air
are needed
to maintain
a relatively few
human beings.
A. a B. which C. are needed D. a relatively few
A. a B. which C. are needed D. a relatively few
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参考答案:A 应改为referring to。
参考答案:C 应改为over。
参考答案:C 应改为should have planned。
4.单项选择题Although I had been invited to the opening ceremony, I was unable to attend ______ such short notice.
A.to
B.in
C.with
D.on
5.单项选择题This is an existing area of study, and one ______ which new applications are being discovered almost daily.
A.from
B.by
C.in
D.through
6.单项选择题I"ve kept up a friendship with a girl whom I was at school ______ twenty years ago.
A.about
B.since
C.till
D.with
7.单项选择题Although we feel dissatisfied with the election results, we have to become reconciled ______ the decision made by our fellow countrymen.
A.for
B.on
C.to
D.in
8.单项选择题Observations were made ______ the children at the beginning and at the end of pre-school and first grade.
A.towards
B.of
C.on
D.with
9.单项选择题Come what ______ ,we"re not going to make any concessions to his unreasonable demands.
A.must
B.should
C.can
D.may
10.单项选择题Since she is angry, we ______ her alone.
A.had better leaving
B.must leave
C.can leave
D.might as well leave
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