听音，补全句子，注意大小写。(12分)
（1）________ go on a field trip.
（2）What are ________ doing?
（3）The children are ________ leaves.
（4）A：Is Mike ________ insects?
B：Yes, he is.
听音，补全句子，注意大小写。(12分)
（1）________ go on a field trip.
（2）What are ________ doing?
（3）The children are ________ leaves.
（4）A：Is Mike ________ insects?
B：Yes, he is.
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