—Are you worried about his safety?
—Only ______.
A. gradually B. broadly
C. slightly D. extremely
Since you are in a hurry, why don’t you ______ for a taxi ______ stay here waiting for the bus?
A. calling; other than B. call; rather than
C. call;more than D. calling;or rather
This chemical class is about the ______ of metals with oxygen and our teacher shows us how iron ______ air and water.
A. react; reacts with B. react; reacts to
C. reaction; reacts to D. reaction; reacts with
After his journey from abroad, Richard Jones returned home, ______ .
A. energetic B. confirmed
C. exhausted D. independent
I was still sleeping when the fire ________, and then it spread quickly.
A. broke out B. put out
C. came out D. got out
During the long summer holidays, it is a _______ for American children to spend several weeks at summer camps.
A. costume B. custom C. customer D.feast
