.Amaybegivenmeansofflags,light

.A ________may be given ____means of flags, lights, and guns.

A．sign; by

B．signal; in

C．signal; by

D．sign; in

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相关试题

32. In the end I lost my ______ and shouted at her.

A．character

B．manner

C．benefit

D．Patience

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31. Lewis was much admired ______ his work on the advanced medical research.

A．on

B．in

C．for

D．With

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30. The pilot, whether ______ or design, made the plane do a sharp turn.

A．by accident

B．at times

C．suddenly

D．all at once

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29. If you ______ go, at least wait until the rain stops.

A．can

B．must

C．should

D．Would

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28. The reason for his success is ______ he worked very hard.

A．why

B．that

C．whether

D．How

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