Mr. and Mrs. White _______ at 8: 30 for the wedding, but they don’t show up.
| A．should have arrived | B．must have arrived |
| C．can not have arrived | D．needn’t have arrived |
9．Young adults generally make their own choices about__________job to take.
| A．what | B．that | C．how | D．Whether |
8．The silence of the library is sometimes broken by a sudden cough or the sound of pages__________.
| A．turning | B．turned | C．being turned | D．having turned |
7．John’s ability to learn from observations and experience_______greatly to his success in public life.
| A．owed | B．attached | C．related | D．contributed |
6．--- Is there any possible way to help them get rid of such a bad habit?
--- To tell the truth, it’s very hard. But we teachers________on this problem.
| A．are working | B．had worked | C．worked | D．had been working |
5．--- Thank you every so much for your timely help.
--- .
| A．Glad to hear that | B．Think nothing of it | C．With pleasure | D．That’s right |