Pipes made of plastic are now widely used in building as they are light and do not become _________ in water.
（A）ripe
（B）instant
（C）rotten
（D）mature
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更多大学英语选择题200道试题
- 1I want you to succeed without __________ and firmly believe that you will succeed if you try hard enough.
- 2After that they drove to the Guest House at ___________ speed.
- 3You lose your head when you get upset and lose __________ of your actions.
- 4It is politely requested by the hotel management that radios _____________ after 11 o'clock at night.
- 5The boss thought him a trouble-maker and turned him ______.
