With the widespread of fog and haze(雾霾) in central and eastern China, our government is supposed to ______ their efforts to prevent further pollution.
| A．make up | B．show up |
| C．step up | D．wake up |
Summer is _______ good time for keeping fit, so you can join a sports club to help build your body in _______ summer of 2011.
| A．a; the | B．/; / | C．a; / | D．/; the |
What would have happened ______as far as the river bank ?
| A．Bob had walked farther | B．if Bob should walk farther |
| C．had Bob walked farther | D．if Bob walked farther |
Word comes ______free souvenirs will be given to _____comes first.
| A．what; no matter whom | B．that; whoever |
| C．which; whomever | D．that; no matter who |
If in wet sand, the vegetables can fresh for a long time.
| A．being buried；remain | B．buried；be remained |
| C．buried；remain | D．burying；remain |
There is no doubt ______ international cooperation is key to ______ with cybercrime, as Vinton Cerf has said that the problem of cybercrime is _______ huge that it requires UN to form a special agency to act as an international referee or steward.
| A．whether; doing; so | B．that; dealing; so |
| C．whether; dealing; such | D．that; doing; such |