皮皮学，免费搜题
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搜题
【单选题】
—Jane looks so painful, there _____ be something wrong with her. —Oh, dear! We'd better take her to the nearest hospital at once. [ ]A.
can
B.
should
C.
would
D.
must
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举一反三
【单选题】Imagine our surprise when five minutes later, we _________Sarah's mum's car driving up to the house!
A.
had seen
B.
had been seeing
C.
saw
D.
seen
【单选题】污染物可以随空气、水的流动和动物的活动、水的渗透而迁移,此句话表明了污染的( )特征。
A.
影响范围大
B.
作用时间长
C.
作用复杂
D.
浓度低
E.
作用方式独