Although ________ my opinion, the old professor didn't come up with his own．

A．against

B．on

C．for

D．in

With some books badly needed ________, she went home happily．

A．buying

B．bought

C．to buy

D．buy

When I practiced running on the playground, my strength ________ and I fell onto the ground．

A．gave away

B．gave in

C．gave off

D．gave out

It is the test system, rather than the teachers, ________ is to blame for the students' heavy burden nowadays．

A．who

B．this

C．that

D．whom

Betty's parents are away for the week, so I think I'd go over to keep her ________．

A．company

B．firm

C．absence

D．favor

True friendship is like sound health, ________ value is seldom known until it is lost．

A．whose

B．of which

C．as

D．which

________ not to hang out at midnight, the boy headed home soon．

A．Reminding

B．Having reminded

C．Reminded

D．To remind

With trees and grass ________ 39.6％ of the urban area, the city of Weifang has taken on a new look．

A．covered

B．covering

C．to be covered

D．being covered

After the high-speed train crash, Chinese President Hu Jintao and Premier Wen Jiabao ________ “all-out efforts” to rescue injured passengers．

A．called on

B．called for

C．called up

D．called out

In hot and dull summer afternoons, icy coffee ________ a wonderful drink．

A．produces

B．makes

C．remains

D．gets