Air pollution has become ____than ever before. We must do something to stop it.
A. the more serious B. more serious
C. seriouser D. the most serious
You will make great progress in English ______ you never give up.
A. and B. as long as C. or D. But
Who is going to take care of Tom when his parents are away ____ business?
A. in B. with C. for D. On
David gave two______ his money to the poor children in the countryside.
A. millions of B. million C. millions D. million of
Don’t give up and _______learning. I’m sure you will succeed one day.
A. stick to B. turn to C. pick up D. ask for
—Would you like coffee or tea?
— ______. Some water, please.
A.Both B. Neither C. Either D. All
