对我点头,我冷静下来,从这些信息看,本题选A,妈妈在
鼓励我。
答案:A 10.It would be a good idea to use a plastic bottle,________
cut off,as a container to grow young plants in.
A.of which the top
B.the top is
C.the top of which
D.with its top
解析:此题是独立主格结构,如果题干改为________is cut
off,答案则为A或C。
答案:D 过去完成进行时表示动作在过去某一时间之前开始,一直延续到另一过去时间。动作是否继续下去,要由上下文而定。和过去完成时一样,过去完成进行时也必须以一过去时间为前提。 I had been looking for it for days before I found it. 这个东西,我找了很多天才找着。 They’d only been waiting for the bus a few moments when it came. 他们只等了一会儿,公共汽车就来了。 The telephone had been ringing for three minutes before it was answered. 电话铃响了三分钟才有人接。 和过去完成时一样,过去完成进行时可后接具有“突然”意义的when从句 (有些从句用一般过去时)。 过去完成进行时 I had only been reading a few minutes when he came in. 我刚看了几分钟书他就进来了。 She’d only been studying her lesson for ten minutes when her little sister interrupted her. 她温习功课不过十分钟,她的小妹妹就把她打断了。 另一方面,这个时态也和现在完成进行时一样,也可有一些特别的含义: (1)尚未完成 (2)企图 He had been studying the meaning of this proverb.(He was trying to study it.) (3)未得结果 We had been studying what our enemy had said.(But we were not able to understand it.)
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