China’s New Food Act provides for a food recall system to producers have to stop production their food isn’t up to standards.
| A．that; if | B．where; if | C．which; when | D．when; where |
Mountain climbing _______ be tiring and many people feel sick as the atmosphere gets thinner.
| A．need | B．can | C．must | D．would |
Now she is considering taking some weight-loss pills, _______ she thinks will help her become slim.
| A．which | B．that | C．what | D．who |
The _______ boy made the police and his family _______.
| A．gone; puzzled | B．missing; puzzled |
| C．missing; puzzling | D．lost; puzzling |
_______ his studies, he started travelling in China.
| A．As soon as finish | B．As soon as finishing |
| C．Upon finishing | D．Upon finish |
He sat on his bed looking at his brother, _______ had his arms crossed and looked angry.
| A．that | B．whom | C．who | D．which |