Americans eat ______ vegetables each person today as they did 20 years ago.
| A．more than twice |
| B．as twice as many |
| C．twice as many as |
| D．more than twice as many |
---Mr. White didn’t come last night, did he?
---No. We for him. A whole night was wasted.
A. had waited B. have been waiting C. were waiting D, had been waiting
---I beg your pardon!
---Oh, you to me carefully. (just now)
| A．didn’t | B．haven’t listened | C．don’t listen | D．weren’t listening |
Where on earth have you been? We you back much earlier.
| A．were expecting | B．are expecting | C．had expected | D．expect |
He works in a factory now, but he on a farm for 20 years.
| A．worked | B．has worked | C．had worked | D．had been working |
Glad to see you back. How long in Russia?
| A．did you stay | B．have you stayed | C．were you staying | D．have you been staying |