Only when he read the newspaper _____ the US President Obama would deliver a speech in his university．
A．he knew B．he had known
C．had he known D．did he know
He came to a point _____ there was no more road to follow, and before him he could see nothing but a thick forest．
A．that B．what C．which D．where
_____ about the safety of her son, John's mother looked upset．
A．Concerning B．Concerned C．To concern D．Concern
Recent studies have shown that most US graduates receive cash as gifts, though the amount received ______ from person to person．
A．prefers B．promotes C．varies D．suffers
We didn’t know you were in trouble at that time. ,we would have given you a hand.
A．However B．Besides C．Otherwise D．Anyway
—You should take exercise in your spare time.
—I want to, but the little time I have outside of school is with part-time job.
A．taken away B．taken in C．taken out D．taken up
