．To deal with the global financial crisis, China ______ the international community to help developing countries．
| A．called on | B．called up | C．called in | D．called for |
I will appreciate if you paid in cash.
| A．that | B．you | C．this | D．it |
It was not until dark he found he thought was the correct way to solve the problem.
| A．that；what | B．that；that | C．when；what | D．when；that |
The students are listening to the teacher with their eyes the blackboard.
| A．fixing on | B．fixing to | C．fixed on | D．fixed to |
It was in this house ______ he heard some strange sounds.
| A．that | B．where | C．which | D．who |
----Where did you find the wallet?
---- It was at the stadium_____I played football.
| A．That | B．there | C．which | D．where |