---- Where did you watch the national flag being raised last Monday morning?---- It was on the square _____ we flew kites sometimes.
The Changjiang River has been polluted badly and is not good _______.
I think he must have seen me at the meeting last night, ______?
The ______ look on his face suggested that he ______ that he would fail in the Maths test.
______ good, this kind of fruit sells very well in our city.
.—Would you like to join me for a quick lunch before class? —______,but I promised Nancy to go out with her.