We are bound to solve the present severe problem, ________ we act intelligently and promptly.
| A．even though | B．unless | C．as long as | D．in case |
50. You won’t be able to see him because he ______ a meeting in Suzhou when you arrive.
| A．will have had | B．will be having | C．will have | D．is having |
49. Some evidence threw doubt on ______ he had lent the money to the defender.
| A．if | B．which | C．that | D．Whether |
48. She took her son, ran out of the house, and ______ him in the car, drove quickly to the nearest doctor’s office.
| A．put | B．to put | C．putting | D．having put |
47. China’s winning the host of the Olympic was an exciting moment, ______ all Chinese will never forget.
| A．that | B．it | C．one | D．What |
46. He hesitated about the brake, otherwise the accident ______.
| A．could have been avoided | B．could have avoided |
| C．would have avoid | D．should have been avoided |