You must have waited here for a long time ,___________you?
| A．mustn't | B．didn't | C．haven't | D．hadn't |
Hearing the news that he failed in the entrance exam a third time, he sobbed _________.
| A．eagerly | B．desperately | C．seriously | D．carelessly |
What would have happened ________, as far as the cliff?
| A．if Bob has walked farther | B．if Bob should walk farther |
| C．if Bob had walked farther | D．if Bob walked farther |
The 2010 Expo will take place in Shanghai, ________ many countries consider a good chance to introduce their cultures to the world.
| A．where | B．when | C．what | D．which |
The professor’s research finally proved to be ______, though he had spent a lot of money on it.
| A．priceless | B．valuable | C．worthless | D．worthwhile |
The purpose of our advertising is to _________ customers’ attention to our product.
| A．pay | B．devote | C．fix | D．draw |