20． play near the river．It's very dangerousA．NotB．Can'tC．NoD．Don't——青夏教育精英家教网——

20．__________ play near the river．It's very dangerous（危险的）．（　　）

19．Mr．Black is from America．And he can __________ English very well．（　　）

18．Tim ________ math．You can ask him to help you with your math．
Good idea..（　　）

17．Sam，can you help me？
Sorry，Mom．I _________ on the phone．（　　）

16．Your clothes are dirty．Please __________ them this afternoon．（　　）

15．-I called you this morning，but you didn't answer the phone．
-Oh，I ________ the flowers in the garden．（　　）

14．-What were you doing ________ the storm came？
-I was taking a shower ________ my mother was cleaning the house．（　　）

13．-I was tired after climbing that high mountain yesterday．
-Me too.1was so tired that I ________ quickly after I lay down．（　　）

12．-How do you like the ________ man living next to our house，Bill？
-Although he can't see anything，he can look after himself well．（　　）

11．The cat often runs up the tree．（用now改写句子）
The catis running up the tree now．

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