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英语选择题求教(10) Mary is responding _____ treatment and will soon

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英语选择题求教
(10) Mary is responding _____ treatment and will soon be cured of her illness.
A. to B. with C. for D. into
(11) She keeps telling me that it is essential that I ______ there on time.
A. was B. were C. be D. am
请解释下原因,谢谢
1.A
固定短语“respond to...”,意思是“对...有反应”.
而respond to treatment意思是“对治疗有了反应”即“治疗后病有了起色”.
2.C
“it is essential that从句”中的that从句必须采用虚拟语气,即其谓语动词由“should + 动词原形”构成,should可以省略.
即:C be = should be