_____ life will continue on the earth for millions of years to come will depend on ______this problem can be solved.
A.Whether; that | B.That; why | C.Thathow | D.Whether; whether |
Cleaning women in big cities usually get ____by the hour.
A.pay | B.paying | C.paid | D. to pay |
It is about time that he ______ to supper, for he still has a meeting to attend this evening.
A goes B went C has gone D go
Only when class began ______that he had left his book at home.
A.will he realize | B.he did realize | C.did he realize | D.had he realized |
They will fly to Washington, ______they plan to stay for two or three days.
A.which | B.where | C.there | D.when |
The explanation of our teacher will make the reading easy ______.
A.to be understand | B.to understand | C.understood | D.understanding |