He usually _____ TV on Sunday evening.
A. watch
B. watches
C. watching
D. is watching
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Why are you___ a T-shirt? You’ll probably catch a cold in this cold weather
A. wearing
B. recycling
C. pulling
D. selling
How are you going to be a basketball player ?—I ____ every day.
A. am going to practice basketball
B. am going to study math
C. am going to take acting lessons
D. am going to study computer science
下列叙述正确的是
A. 天然橡胶可以利用硫磺进行交联反应
B. 纤维素甲基化是聚合度变大的反应
C. 聚丙烯酰胺水解可以达到100%
下面说法中错误的是
A. 苯乙烯聚合降解得到40%的单体
B. 聚乙烯聚合降解得到20%的单体
C. 聚甲基丙烯酸甲酯降解得到100%单体
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