Mary and Bob are great. of them are in the competition.
| A．None | B．Neither |
| C．All | D．Both |
Two thirds of the population of the village ________ farmers. The number of them ________ about 2,000.
| A．is, is | B．is, are |
| C．are, are | D．are, is |
—I ________ a new house recently.
—Great. When ________ you ________ it?
| A．have bought, did, buy | B．have bought, have, bought |
| C．bought, did, buy | D．bought, have, bought |
The policeman asked the child ________ cross the street ________ the traffic lights turned green.
| A．not, when | B．not to, until |
| C．didn't, before | D．not to, after |
—I called you last night, but no one answered me.
—Oh, I________ a shower.
| A．have taken | B．was taking |
| C．took | D．will take |
I have _____ decided when to leave, but my sister hasn’t decided_____.
| A．yet, yet | B．already, already |
| C．already, yet | D．yet, already |