____ to everyone the importance and value of these historic sites, the government has strengthened regulations to protect them.
| A．To stress | B．Stressing |
| C．Having stressed | D．Stressed |
The letter Mary had looked forward to ____her last night and she was very excited．
| A．reached | B．reaching ' | C．had reached | D．has reached |
The news shocked the whole nation ____a strong earthquake hit Yushu on Apr．14, 2010．
| A．what | B．when | C．that | D．which |
You ____be tired—you have worked only for ten minutes．
| A．won't | B．mustn't | C．needn't | D．can't |
—Tom lost his job last week．
—___he is wandering in the street these days．
| A．No doubt | B．No way | C．No wonder | D．No problem |
The witnesses(证人) of the accident said that the lorry _______ very fast at the crossroads when the accident happened.
| A．is traveling | B．had travelled |
| C．was to travel | D．was travelling |