According to the survey, two thirds of the area__________covered by trees now and 90% of the population__________contributions to the Greening Project in the city.
A. is ; has made B. are; have made
C. is; have made D. are; has made
He asked me__________with me.
A. what the matter is B. what the matter was
C. what is the matter D. what was the matter
It is time for class. Will you please get the blackboard__________?
A. to clean B. cleaning C. cleaned D. having cleaned
This is the biggest lab__________we have ever built in our university.
A. which B. what C. that D. Where
He is__________as a leader but he hasn't__________in teaching.
A. success; many experiences B. a success; much experience
C. great success; an experience D. a great success; any experiences
Only by practising constantly__________ greater progress.
A. we can make B. then we will make
C. can we make D. we must make
