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19.Frank took _____ of the fine weather to do a day’s work in the garden.（ ）
A.interest
B.chance
C.advantage
D.charge
19.C【解析】take advantage of sth.为固定搭配，意为“利用，发挥……的优势”。故选C。
20.—How did Mike get his car out of the ditch？
—_____it.（ ）
A.To push
B.From pushing
C.By pushing
D.Havin pushed
20.C【解析】题干特殊疑问句的疑问词为“how”，表明针对方式的提问。句意：—Mike是怎么把他的车从沟里弄出来的？—他把车推出来的。by doing sth.表方式、手段、方法，故选C。
21.______that the pilot couldn’t fly through it.（ ）
A.So severe was the storm
B.The storm so severe was
C.So the storm was severe
D.Such was the storm severe
21.A【解析】在so…that…结构中，若将so+形容词/副词置于句首，则其后的主句要用部分倒装。故C选项错误；B选项的正确形式应为“The storm was so severe”；D选项应为“It was such a severe storm”。故只有A选项正确。
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