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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