语法练习

1.A few animals aometimes fool their enemies ___ to be dead.

A.appear

B.to appear

C.by appearing

D.to be appearing

2.Had he worked harder, he ___ the exams.

A.must have got through

B.would have got through

C.would get through

D.could get through

3.The pressure ___ causes Americans to be energetic, but it also puts them under a constant emotional strain.

A.to compete

B.competing

C.to be competed

D.having competed

4.Your hair wants ___. You had better have it done tomorrow.

A.cut

B.to cut

C.cutting

D.being cut

5.___, a man who expresses himself effectively is sure to succeed more rapidly than a man whose command oflanguage is poor.

A.Other things being equal

B.Were other things equal

C.To be equal to other things

答案详解

1.[C]【解析】介词短语作状语。根据题意，答案应选by appearing表示方式。句意：一些动物有时根据假寐（装死）来迷惑它们的敌人。

2.[B]【解析】与过去事实相反的虚拟语气。根据从句时态可知是对过去事实的假设，因为省略了if，所以条件句中had倒装提前，主句用would have done结构，所以正确答案选B项。句意：如果他过去努力一些的话，现在就能通过这次考试了。

3.[A]【解析】非谓语动词。本题的pressure要求一个定语。A项to compete是不定式，表示“竞争的（压力）”，可作pressure的后置定语。B项competing是现在分词，如作定语常置于名词之前。C项to be competed为不定式被动语态，而compete常用主动语态形式，如：compete with/aganist。D项having competed是现在分词完成式，不符合本题句意。因此，正确答案是A项。句意：竞争的压力使美国人精力旺盛、积极上进，但又常常使他们情绪极度紧张。

4.[C]【解析】动词的惯用搭配。want与need较相似，在表示“需要、应该”是要求跟动名词主动语态或不定式被动结构。因此，只有C项正确。句意：你该理发了，最好明天就去理吧。

5.[A]【解析】分词独立结构。分词作状语时，其逻辑主语和谓语动词的主语必须一致。否则分词必须有自己的主语。这种带逻辑主语的分词结构成为分词独立结构，或独立主格。本题B、C、D项都不符合这一语法结构。因此，正确答案为A项。句意：同样条件下，一位擅于表达自己的男人，肯定比一位语言贫乏不能充分表达自己的男人更易获得成功。