2. 外语
  3. The long-awaited Hubble Space Telescope, ______ to orbit the Earth next March, will observe some of the oldest stars in the sky.

The long-awaited Hubble Space Telescope, ______ to orbit the Earth next March, will observe some of the oldest stars in the sky.

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问题 The long-awaited Hubble Space Telescope, ______ to orbit the Earth next March, will observe some of the oldest stars in the sky.
选项 A、subject
B、owing
C、available
D、due
答案D
解析 这四个词后都可以和介词to连用，owing to，due to是固定搭配，相当于becauseof，是复合介词；subject to“受支配于……”，其中to也是介词；available to sb．“可供某人使用”，to还是介词，但句中to后面是动词orbit“进入运行轨道”，显然to在这里仅是不定式的符号，四个词只有due作形容词时后面可接不定式，作“预定的”讲。句中due to orbit the Earth next March可以理解为省略了which is的非限定性定语从句，即…(which is)due to orbit the Earth next March…。due作形容词+不定式的用法很多，如：The train is due to leave at nine．“火车定于九点开出。”由于考生对dueto do sth．这一用法不熟悉，往往容易选错。
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