Years ago we didn't know this, but recent science study ________that people who don't sleep well soon get ill.
A. showed B. will show C. has shown D. is showing
Is it only on the world market ________we can prove the competitiveness and quality of our goods?
A. where B. which C. that D. how
—We need a person badly to be in charge of this design.
—________ the new comer have a try?
A. May B. Will C. Shall D. Need
I wonder why Jack always gets good marks when he does only ________ the others.
A. half as much as B. as much as half
C. half as many as D. as many as half
Not only ________ give people relaxation and pleasure, but ________ increase their knowledge of any kind.
A. can travel; it can B. travel can; can it
C. can travel; can it D. travel can; it can
When ________ questions in class, one should answer them as clearly as possible.
A. asking B. to ask C. to be asked D. asked
