_____ 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
—What is that noise?
—Oh, I forgot to tell you that the new machine .
A．was tested B．will be tested C．has been tested D．is being tested
Life is a , meet it! Life is a dream, realize it! Life is a game, play it!
A．challenge B．disaster C．hardship D．stage
