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【单选题】
婴幼儿的认生通常出现在()A.
3-6个月
B.
6-12个月
C.
1-2岁
D.
2-3岁
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举一反三
【单选题】听力原文：W: Why so early? M: Early? It's 3 o'clock now. School starts at 8:45 in the morning and ends at 3 in the afternoon. W: In my country, we go to school from 8 a. m. until 5 p. m. M: Gosh! What 'can...
A.
They are both neighbors.
B.
They are both classmates.
C.
They are not from the same country.
【单选题】第1篇 The Gene Industry Major companies and already in pursuit of commercial applications of the new biology. They dream of placing enzymes in the automobile to monitor exhaust and send data on pollutio...
A.
using metal-hungry microbes
B.
making use of enzymes
C.
adjusting the engine
D.
patenting new life forms
【单选题】You must attend the meeting ____ at ten o’clock, as it is scheduled—not a minute early or late．
A.
accurately
B.
punctually
C.
flexibly
D.
approximately
【单选题】Could I have an early morning call ________six o’clock tomorrow?
A.
on
B.
to
C.
at
D.
in
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