题目内容
根据句意填入一个适当的词:
They have sent ________ several spaceships this year.
答案:up
解析:
解析:
|
send up发射。 |
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题目内容
根据句意填入一个适当的词:
They have sent ________ several spaceships this year.
|
send up发射。 |