问题
选择题
Many people have come to realize they should go on ________ diet and make room for ________ exercise．
A．a; 不填
B．the; an
C．the; the
D．不填; an
答案
A
考查冠词。固定短语go on a diet节食；exercise锻炼；是不可数名词。句意：很多人认识到了他们应该节食，腾出空间来锻炼。