2. 外语
  3. It is desirable that the airplane______as light and fast as possible.

It is desirable that the airplane______as light and fast as possible.

admin2013-01-10  25
问题 It is desirable that the airplane______as light and fast as possible.
选项 A、be made
B、is made
C、were made
D、has been made
答案A
解析 在It is/was advisable/desirable/essential/important/imperative/necessary/normal/ preferable/vital等形容词+that+结构的主语从句中，谓语动词英国英语用should+ 动词原形，而美国英语只用动词原形，故本题答案是A。
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