题目内容

固定翼无人机相比旋翼无人机来说,对跑道的要求低,使用范围广泛()

A. 对
B. 错

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Choose the best answer to complete each sentence._______ late again, Bill!

A. Don't to be
B. Don't be
C. Not be
D. Be not

________ me an e-mail before you come to Hangzhou. I’ll meet you at the airport.

A. Sending
B. To send
C. Sends
D. Send

________ to smile at your life when you are in trouble, and you will soon be happy again.

A. Try
B. To try
C. Trying
D. Tried

--- Jack, don’t always copy what others do. ________ your head, please.--- Thanks for telling me.

A. Using
B. Used
C. Uses
D. Use

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