If a thing is worth ______, it must be well ______.
A. doing; done B. to do; doing C. to do; done D. being done; doing
I, who ____ your teacher, will try my best to help you with your English.
A. is B. are C. be D. am
All that can be done _______.
A. has been done B. has done C. have done D. were done
The man couldn’t _____the fact that the lost watch was found in his house.
A. explain for B. account for C. amount to D. refer to
Towards _______evening, ________ cold rain began to fall down.
A. an; a B./ ; a C. the; the D. the; a
Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.
A. to come; if B. coming; if C. to come; whether D. coming; whether
