I feel sure I _____ her before somewhere.
| A．was to meet | B．have met | C．had met | D．would meet |
My grandfather keeps healthy by ______ for half an hour every morning.
| A．working out | B．acting out | C．taking out | D．looking out |
The teacher wrote an example on the blackboard to ______ the point.
| A．illustrate | B．suggest | C．express | D．recognize |
A single pipeline ___________ all the houses with water.
| A．is served | B．serves | C．are serving | D．serve |
Whom would you rather _________ you to the hospital?
| A．have sending | B．have send | C．having send | D．having sent |
Prices of daily goods _______ through a computer can be lower than store prices.
| A．are bought | B．bought | C．been bought | D．buying |