1.What do you usually do____Christmas?A.on B.at C.in D.for2.She is____the blackboard,but she can't ____the words on it.A.looking at;see B.seeing;look at C.seeing;see D.looking at;look at选出其中正确的一项

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1.What do you usually do____Christmas?A.on B.at C.in D.for2.She is____the blackboard,but she can't ____the words on it.A.looking at;see B.seeing;look at C.seeing;see D.looking at;look at选出其中正确的一项

1.What do you usually do____Christmas?A.on B.at C.in D.for2.She is____the blackboard,but she can't ____the words on it.A.looking at;see B.seeing;look at C.seeing;see D.looking at;look at选出其中正确的一项
1.What do you usually do____Christmas?
A.on B.at C.in D.for
2.She is____the blackboard,but she can't ____the words on it.
A.looking at;see B.seeing;look at C.seeing;see D.looking at;look at
选出其中正确的一项

1.What do you usually do____Christmas?A.on B.at C.in D.for2.She is____the blackboard,but she can't ____the words on it.A.looking at;see B.seeing;look at C.seeing;see D.looking at;look at选出其中正确的一项
1、A 节日前面用on
2、A look at表示看的动作,see表示看的结果

1.B 2.A

a
a

1.A
2.A

1.具体某一天用on
具体某一时间点用at
在某一段时间内用in
持续一段时间用for
所以选A
2. A

1. C
2. A

C,A。

A 表特定的时间用on
A前半句是考察现在进行时的用法,而后半句是考察情态动词的用法,情态动词后面的单词用原形