_________, the experiment is sure to succeed.
A. If carefully doing B. If carefully done
C. If it done carefully D. If it doing carefully
The cost of buying a house in Beijing is higher than ______in Luoyang。
A. it B. one C. that D. this
.There are over 58000 rocky objects in _______space，about 900 of which could fall down onto ______earth。
A. the；the B. 不填；the C. the； 不填 D. 不填；不填
-----Did you enjoy your trip to the town?
-----_________. We had driven more than 3 hours before we found the right way.
A. Absolutely B. Go ahead C. Not at all D. Quite a lot
We are kept ____ what is happening in the world by reading newspapers and watching TV.
A. to inform B. to be informed about
C. informing of D. informed of
She had just finished her homework her mother asked her to practice playing the piano yesterday.
A. when B. while C. after D. since
