31. Americans eat _______________ vegetables per person today as they did in 1910.
| A．more than twice | B．as twice as many | C．twice as many as | D．more than twice as many |
—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 |
Stick to what you think is right, ________ you will gain a surprising happy ending.
| A．and | B．but | C．before | D．so |