It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors _____ the wide spread of H1N1.
| A．result from | B．benefit from |
| C．devote to | D．contribute to |
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
| A．to | B．for | C．in | D．Against |
Everyone has periods in their lives________ everything seems very hard.
| A．when | B．where | C．which | D．That |
—How about camping this weekend，just for a change?
—OK，________you want.
| A．whichever | B．however | C．whatever | D．Whoever |
In _________to being used in industry，laser can be applied to operations in the hospital.
| A．devotion | B．addition |
| C．application | D．Reception |
Children under 18 will not be ____into the pub in this country.
| A．designed | B．decorated |
| C．competed | D．Admitted |