We never visit a friend's house without calling first.

1. A.
   if we don't call first
2. B.
   when calling first
3. C.
   unless we call first
4. D.
   A and C

选出意思与画线部分相同的选项

We never visit a friend's house without calling first.

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(从方框中选择适当的介词、副词填空)

up of in without at about after except before by

1.They often just drop ______ their friends’homes．

2. In Switzerland，we never visit a friend’s house _________calling first．

3. We need to know _________ table manners when we visit Japan．

4. First _________ all，you should finish your homework．

5. He picked ________ his hat and went out．

6. Tom arrives ___________ Beijing on time．

7. He was pointing his finger _________ me．

8. We’re the land of watches，________ all．

9. Everyone is here __________ Tom and Jim．

10. He didn’t go to school the day ______ yesterday．