The trouble is ____ we can not find such an expert.
| A．why | B．that | C．where | D．/ |
—Does Liu Hui serve in the army?
—No, but he ________ in the army for three years.
| A．served | B．has served | C．is serving | D．would serve |
I feel sure I ________ her somewhere before.
| A．was to meet | B．have met | C．had met | D．would meet |
—Are you a teacher?
—I ________, but now I am working in a company.
| A．is | B．am | C．was | D．had |
I ________ your last point — could you say it again?
| A．didn’t quite catch | B．don’t quite catch | C．hadn’t quite catch | D．can’t quite catch |
They won’t buy any new clothes because they ________ money to buy a new car.
| A．save | B．were saving | C．have saved | D．are saving |