The reason ________ he hasn’t come is ________.
| A．that; because he is ill | B．that; because of his illness |
| C．why; for he is ill | D．why; that he is ill |
—Do you know how to start the machine?
—________．I’m a green hand．
| A．Not a clue | B．Exactly | C．By all means | D．Just so-so |
We are a team so we must assist one another _____ completing the task．
| A．with | B．to | C．at | D．in |
—Excuse me, Madam．Taking photos is forbidden here out of security．
—I’m really sorry, I _______ of that．
| A．am not informed | B．hasn’t been informed |
| C．hadn’t been informed | D．wasn’t informed |
The civil war broke out in Libya, ______ to the instability of the international oil price．
| A．to contribute | B．contributed |
| C．having contributed | D．contributing |
Recently a new social issue has been brought to everyone’s attention _____food additives are abused．
| A．when | B．whether | C．that | D．which |