It was with great joy _______ Tom received the news that his lost son had been found．
| A．because | B．which |
| C．since | D．that |
---What’s ______population of China?
---China has_____ population of 1.3 billion.
| A．a； the | B．the； a | C．/；/ | D．the； the |
Taking this medicine, if ________, will certainly do damage to your health, as the doctor advises.
| A．continuing | B．continued | C．keeping | D．to keep |
However _______, it’s worth it and I’ll get it .
| A．the watch costs | B．much the watch costs |
| C．the watch will cost | D．much does the watch cost |
—_______ do you like to fly, economy or first class?
—Economy, I think.
| A．What | B．Where | C．Which | D．How |
After the heavy mudslide happened in Sichuan, hundreds of newspaper reporters were sent to ____ the natural disaster.
| A．describe | B．cover | C．witness | D．experience |