1.____native to North America, corn has now spread all over the world.
A. In spite of
B. That it is
C. It was
D. Although
2. Our civilization cannot be thought of as____in a short period of time.
A. to have been created
B. to be created
C. having been created
D. being created
3. We feel it is high time that the Government ____something to check the inflation.
A. did
B. do
C. should do
D. would do
4. It has been proposed that we____our decision until the next meeting.
A. delayed
B. delay
C. can delay
D. are to delay
5. Hurricanes are severe cyclones with winds over seventyfive miles an hour ____originate over tropical ocean waters.
A. which
B. who
C. where
D. how to
答案:
1. D)
【句意】玉米虽原产于北美洲，但现在已遍及全世界。
【难点】四个选项中，B)和C)不合理。A)项的in spite of 是复合介词，后接名词。D)项的although是连词，后接从句，在本句中接的是一个省略主语的从句。
2. C)
【句意】不应把我们的文明看作是短期内创造出来的。
【难点】as 在这里是介词，后面应接名词性质的词，create的动作是过去发生的，所以选C)。
3. A)
【句意】我们认为该到政府采取措施抑制通货膨胀的时候了。
【难点】it is high time that后面接虚拟语气，时态用一般过去时，意为“该到…时候了”。
4. B)
【句意】有人建议我们应将我们的决定推迟到下次会议作出。
【难点】在suggest, propose, demand ,insist 等动词后面的宾语从句中，应使用（should）+动词原形的虚拟语气。
5. A)
【句意】 飓风是生成于热带海洋水域上空、风速达每小时75英里以上的强烈气旋。
【难点】关系代词which引导的定语从句修饰名词winds.
