实验室认可证书有效期:英语选择题..

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1.When___why she could speak English so well,she just smiled and said nothing.
A.asking B.asked C.to be asked D.was asked

2.What a surprise!My deskmate,___a lazy boy,offered to sweep the floor after class.
A.considering B.who considered C.considered D.who was considering

3.___is mentioned above,environmental pollution is becoming more and more serious.
A.It B.What C.As D.That

4.The manager spent the whole morning___in his office,___what he should do next.
A.locking;thought
B.locked;thinking
C.locking;thinking
D.locked;thought
答案是BCCB
麻烦给个简单的解释谢谢

1.B 她是被问,在状语从句中如果动词和主语为被动关系,用过去分词
2.C 被认为,在状语从句中是过去分词
3.C AS代指主句内容(如果括号在句中用WHICH也行)
4.B 同1啊,第一个空是被动,第二个是主动,伴随状语

1)她是被人问,当然用过去分词:asked
2)也是被动的,用considered,或者who was considered
3)As is mentioned above意思为正如上面所说的
4)A D根据第二空可以首先排除。
spend sometime (in) doing sth的意思在某事上化了多少时间,如果选c明显意思不同,舍去。只能选B。意思为;经理被锁在他办公室里整整一个上午。

B C C B
肯定全对
1 当她被问及为什么英语说得这么好时,她只是笑笑却什么也没有说。关键:1 被动。2 不是将来时。
2 多么令人吃惊啊。我那被认为是懒孩子的同桌竟然课后主动拖地板。关键:被动。
3 正如以上所提,环境污染变得越来越严重。
It is mentioned that...
What is mentioned is that ...
That is mentioned.
4 经理整个早晨把自己关在办公室,想着接下来该怎么办。关键:1 lock是及物动词。2 thinking 作伴随状语。