To help a friend solve the problem troubling him, .
| A．a friend should be made known of his difficult situation |
| B．a man should be equipped with the kind of knowledge required |
| C．nothing is better than offering of knowledge required |
| D．keeping one’s promises is most important |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
——How much vinegar did you put in the soup?
——I’m sorry to say, ____. I forget.
| A．no | B．no one | C．nothing | D．none |
We hope to go to the beach tomorrow, but we won’t go ____ it’s raining.
| A．if | B．when | C．though | D．because |
Stop making so much noise ____ the neighbor will start complaining.
| A．or else | B．but still | C．and then | D．so that |
Before he went abroad，he spent as much time as he _____ English.
| A．could learning | B．learned | C．to learn | D．could learn |