题目内容
.A ________may be given ____means of flags, lights, and guns.
A.sign; by | B.signal; in | C.signal; by | D.sign; in |
C
解析
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题目内容
.A ________may be given ____means of flags, lights, and guns.
A.sign; by | B.signal; in | C.signal; by | D.sign; in |
C
解析