题目内容
词形转换
environment ________
They are ________ (eat) dinner at the table.
He ________ his homework with his friends yesterday. (do)
win ________
found ________
用所给词的正确形式填空
This is Mary's ________(two) time ________(swim) in the river.
词形转换专练
People ________ (start) Earth in 1970. because of growing concern over pollution.
用所给词的正确形式填空．
First, please let us introduce ________ (oneself).
用所给词的适当形式填空
The big street ________ (run) behind the post office.
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