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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 ld do D. would do
4. It has been proposed that we____our decision until the next meeting.
yed y C. can delay D. are to delay
5. Hurricanes are severe cyclones with winds over seventy?five miles an
hour ____originate over tropical ocean waters.
A. which B. who C. where to
答案解析：
1. D) 【句意】玉米雖原產於北美洲，但現在已遍及全世界。
【難點】四個選項中，B)和C)不合理。A)項的in spite of 是複合介詞，後接名詞。D)項的although是連詞，後接從句，在本句中接的是一個省略主語的從句。
2. C) 【句意】不應把我們的文明看作是短期內創造出來的。
【難點】as 在這裏是介詞，後面應接名詞性質的詞，create的動作是過去發生的，所以選C)。
3. A) 【句意】我們認爲該到政府採取措施抑制通貨膨脹的時候了。
【難點】it is high time that後面接虛擬語氣，時態用一般過去時，意爲“該到…時候了”。
4. B) 【句意】有人建議我們應將我們的決定推遲到下次會議作出。
【難點】在suggest, propose, demand ,insist 等動詞後面的賓語從句中，應使用(should)+動詞原形的虛擬語氣。
5. A) 【句意】 颶風是生成於熱帶海洋水域上空、風速達每小時75英里以上的強烈氣旋。
【難點】關係代詞which引導的定語從句修飾名詞winds
1.____is announced in the papers, our country has launched a large?scale movement against smuggling and fraudulent activities in foreign currency exchange deals.
A. What B. As C. Which D. That
2. All the flights____because of the snowstorm, we had to take the train instead.
canceled B. had been canceled ?C. having canceled D. having been canceled
3. Once ____, this power station will supply all the neighboring towns and villages with electricity.
A. it being completed B. it completed C. completed D. it completes
4. He might have been killed ____the timely arrival of the ambulance.
A. but for B. except for C. besides D. except
5. If you have never planted anything, you won’t be able to know the pleasure of watching the thing you have planted ____.
答案解析：
1. B)【句意】正如報界所宣傳的那樣，我國已發起大規模反走si和反欺詐性外幣交易的運動。
【難點】as在這裏是一個代詞，常用在類似as is well known這樣的.句子中，意爲“這一點”。
2. D) 【句意】所有航班因暴風雪都被取消，我們不得不改乘火車。
【難點】該句的前半句使用的是獨立結構由於動作發生在過去，所以根據題意要求使用了完成式被動語態。
3. C) 【句意】這座電站一建成竣工，就將向周圍城鄉供電。
【難點】once在這裏是連詞，意爲“一旦…就…”，後面省略了it is。[ZK)]
4. A) 【句意】要不是救護車及時到達，他可能就沒命了。
【難點】but for 意爲“要不是”，它的典型使用就是在虛擬語氣的句子中，所以正合題意。
5. A)【句意】如果你從未種植過任何東西，你就不會明白觀察你種植的東西生長所帶來的快樂。
【難點】watch 後接不帶to的不定式作賓語補足語。
