Days of snowstorms have left the city under thick layers of ice and some 50,000 homes without power．
| A．to be trapped | B．trapped | C．having trapped | D．being trapped |
Only after they had discussed matter for several hours ___ a decision.
| A．they reached |
| B．did they reach |
| C．they reach |
| D．do they reach |
—It’s nice. Never before ___ such a special drink!
—I’m glad you like it
| A．I have had |
| B．I had |
| C．have I had |
| D．had I |
Only when he reached the house ___ it was the same place he’d been in last year.
| A．he realized |
| B．he did realize |
| C．realized he |
| D．did he realize |
Never before ___ seen anything who can play tennis as well as Robert.
| A．had she |
| B．she had |
| C．has she |
| D．she has |
Only after Mary read her composition the second time ___ the spelling mistakes.
| A．did she notice |
| B．she noticed |
| C．does she notice |
| D．she has noticed |