相关试题
根据句意，用所给单词的适当形式填空。Columbus made the ___________ (discover)of the new land.
The __________mother thanked the policeman again. (thank)
We should stop using p___________ bags to protect the environment.
Last night his _________ (ill) kept him awake.
Between the two buildings __________ (be) a tall tree.
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