We won’t give up ______ we should fail twenty times.
A. even if B. since
C. whether D. until
Honey, it’s your turn __________ the dishes.
A. cleaning B. to clean
C. of cleaning D. to be cleaned
Hawking is known _________ the greatest scientist alive.
A. of B. for C. as D. to
“China is still a developing country ___________.” said Premier Li at the conference.
A. at present B. for present
C. to present D. to now
The policeman warned us ___________ believe such liars again.
A. not B. don’t
C. didn’t D. not to
I am sure that if you _____________ your time, you’ll achieve greater success.
A. make full use o B. take use of
C. use up D. are used to
