—Have they come here________？
—Yes，they have come here________．
| A．yet；yet |
| B．already；already |
| C．yet；already |
| D．already；yet |
Jeff pleased everybody by making his dog walk ________.
| A．by | B．over | C．from | D．on |
– Look! Here comes your mom’s car.
-- It ______ be hers. She sold her car yesterday.
| A．must | B．can’t | C．needn’t | D．might |
Last time, he offered to do my homework for me , but I ____________.
| A．refused | B．refuse |
| C．have refused | D．will refuse |
-- _________ do you like ping-pong ?
-- Because it is relaxing.
| A．How | B．When | C．Why | D．Where |
—What’s your father?
-- He is a doctor. He _________ in a local hospital.
| A．worked | B．has worked | C．works | D．will work |