Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.
| A．that; to eat | B．whether; to be eaten |
| C．that; to be eaten | D．whether; to eat |
Beijing Man used fire for cooking food and also for light, warmth and ________
wild beasts.
| A．protected from | B．protection from |
| C．protecting from | D．to protect from |
The doctor strongly recommended that he ________ a holiday.
| A．would take | B．took |
| C．had taken | D．take |
Mr.Smith, there's a man at the front door who says he has news for you ________
vital importance.
| A．of | B．with | C．in | D．from |
My sister studied hard at school when she was young, which contributes ________ her success in her career.
| A．with | B．for | C．from | D．to |
China ________ the agreement and there are now 31 Chinese sites ________ the
World Heritage list.
| A．wrote；on | B．signed；on |
| C．agreed；in | D．preserved；in |