{01}He asked his father why he was not able to hatch chickens ______hens could.
A.however
B.while
C.as
D.although
解析: 试题分析:句意:他问他父亲他为什么不能孵小鸡而母鸡却能。A然而,不管,不论;B然而;C由于,当……时;D尽管。根据句意可知前后句内容是转折关系,故选B。 本题选B。 {02} Paul was not allowed to work he was fully recovered from the flu.
A.even if
B.whether
C.because
D.until
解析: 试题分析: A. even if即使,B. whether是否,C. because因为,D. until直到,句意:Paul不被允许工作直到他的流感完全恢复。这里使用了not…until…“直到…才…”,选D。 本题选D。
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