. ---Which is _______, the sun, the earth or the moon? ---Of course, the sun.
| A．big | B．bigger |
| C．biggest | D．the biggest |
A： Is that your physics teacher?
B： That can’t be Mr. Lin. He to Hangzhou with his wife.
| A．has been | B．had gone | C．went | D．has gone |
—What a nice meal! It's really kind of you to invite us.
— I'm glad you liked it.
| A．Not at all | B．Sounds good |
| C．Well done | D．Never mind |
Leave the reference books behind, _____ you won’t be able to think independently.
| A．or | B．and | C．so | D．but |
liu Xiang announced the retirement（退役）in Shanghai _____May 17, 2015.
| A．in | B．on | C．at | D．since |
—Are Sandy and Kate________ good friends?
—Yes, they are. Please look after________ .
| A．your; their | B．your; them |
| C．yours; theirs | D．you; them |