Whether you believe it or not, it is ______that causes your illness.
| A．because of your overweight | B．you are so overweight |
| C．because you are overweight | D．your being overweight |
Unfortunately, when I dropped in, Doctor Li _____ for Beijing to join in the fight again SARS, so we only had time for a few words.
| A．just left | B．has just left |
| C．is just leaving | D．was just leaving |
Children’s brains can’t develop properly_______ they lack protein
| A．when | B．since | C．because | D．unless |
This is the very toy car ________ which he came here the other day.
| A．by | B．in | C．for | D．on |
I began to fish before memory began, _______ I know I have always fished.
| A．so far | B．so as far as | C．as far as | D．so |
______ I had done it I knew I had made a mistake.
| A．Hardly | B．Directly | C．Mostly | D．Nearly |