The human body consists of organs, each ____a definite job to do.
| A．have | B．to have | C．has | D．having |
34.The reason why he failed is ______ he was too careless.
| A．because | B．that | C．for | D．because of |
33. We were about to climb up to the top of the mountain ________ it began to rain heavily.
| A．as | B．while | C．when | D．Since |
32. —How do you find my idea?
—_______.
| A．By opening your notebook. | B．I don’t like it a bit. |
| C．You showed it to me. | D．When I came in, I found it. |
31. Don’t you think that______________ is no use promising without doing?
| A．this | B．that | C．it | D．What |
30. Is this the girl______ whom I can turn for help? Is she good at this subject?
| A．to | B．with | C．in | D．At |