B. I saw; I began to learn
C. I saw; did I begin to learn
D. did I see; I began to learn
【答案】C
【解析】考查固定句式的用法。Not until后面的从句不用倒装,而主句应用部分倒装,故答案为C。
8.The hard life in the mountainous area he has adapted to ____ a real challenge to anyone.
A. mean
B. means
C. meant
D. meaning
【答案】B
【解析】考查非谓语动词。adapt to 的宾语是前面的the hard life,故我们不能用D,本句缺少谓语动词,而且对任何人来说是一个挑战是一般现在时。故答案为B。
9. The process of producing electricity may also give out CO2, ______ you heat your house with electricity instead of charcoal.
A. as long as
B. as soon as
C. as if
D. even if
【答案】D
【解析】考查短语辨析。句意为:产生电的过程也会发出二氧化碳,即使你用电而不是用木炭加热你的屋子。故答案为D。
10.---Why was the young lady taken away by the police?
---- She happened _______ something in the supermarket.
A. to catch stealing
B. to catch to steal
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