The river will be dirtier and dirtier________we do nothing to protect them.
A.since |
B.if |
C.unless |
D.until |
—When can you finish your work?
—I need ______ two hours to finish it.
A.at last | B.at most |
C.at once | D.at least |
—Hi, Bob! _____we go for a trip tomorrow?
—Good idea! That sounds fun.
A.Do | B.Are | C.Shall | D.May |
My son will join in the football game, I will go to _____ him on.
A.cheer | B.catch | C.bring | D.wish |
—_______do you go skating ?
—Twice a week.
A.How long | B.How much |
C.How often | D.How far |
Kate spends an hour ______ swimming every week.
A.practice | B.practices |
C.practicing | D.to practice |