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1
2
3
4
b
2
a
3
b
4
b
答案：
1. b
2. a
3. b
4. b
2. a
3. b
4. b
E Read and trace
1
Let's clean up!
2
Clean the table, please.
3
Clean the chairs, please.
1
Let's clean up!
2
Clean the table, please.
3
Clean the chairs, please.
答案：
1. Let's clean up!
2. Clean the table, please.
3. Clean the chairs, please.
2. Clean the table, please.
3. Clean the chairs, please.
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