The Australian boy has a good ______of Chinese and can communicate with others freely.
A. request B. command C. demand D. usage
Please ______the money and I’m sure it will ______more than 1,000 yuan.
A. add; add up B. add up; add up C. add up; add up to D. add to; add up
Whenever he was asked why he was late for class，he would answer carelessly，______ the same thing.
A. saying B. said C. to say D. say
He is the most suitable person _______the task.
A. to finish B. finishes C. finished D. finishing
_________, 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
