The boy is waiting ____ his sister and they will go to the hospital to wait ____ their sick mother.
| A．for,on | B．on,for | C．for,for | D．on.on |
Mr. Chen, ____ his lady, has a good command of the English language.
| A．as well as | B．and | C．but | D．as well |
She is a nurse,___ a doctor as well.
| A．but | B．nor | C．or | D．and |
.I would be very glad to help, ___ I’m going away on business.
| A．and | B．or | C．for | D．only |
38.The task is hard, ___, the workers managed to finish it in time.
| A．therefore | B．otherwise | C．however | D．yet |
39.When you read the book, you’d better made a mark ____ you have any questions.
| A．at which | B．at where | C．place | D．where |