A flashing red light ______ motorists to trouble ahead.

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问题 A flashing red light ______ motorists to trouble ahead.

选项 A、reminded
B、alerted
C、warned
D、cautioned

答案B

解析    此题考查动词近义词辨析。alert sb. to do sth。意思是“使…处于戒备,警告…作…准备”。remind常与of,to do sth. ,that连用,意思是“使想起,使记起,提醒”。warn意思是“警告,注意,通知”,搭配是warn sb. against sth.或者warn sb. against doing sth.;warn sb off sth.;warn sb.not to do sth.;warn sb.that...。caution意思是“小心,谨慎,警告”,固定搭配和
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