–Did a letter come for me?
–Yes, ____ came for you this morning.
| A．that | B．it | C．one | D．the letter |
--- He worked out such different questions at a very young age.
--- Oh, he ______ a very smart student then.
| A．could have been | B．should have been |
| C．might have been | D．must have been |
In our childhood, we were often ______ by Grandma to pay attention to our table manners.
| A．demanded | B．reminded | C．allowed | D．hoped |
Many lifestyle patterns do such _____ great harm to health that they actually speed up ____ weakening of the human body.
| A．a; 不填 | B．不填; the | C．a; the | D．不填；不填 |
Stay awake! You should know that it ________ to sleep in class.
| A．doesn’t permit | B．is not permitted |
| C．will not be permitted | D．was not permitted |
_______ made the parents proud was________ their son had been admitted to a key university.
| A．What; because | B．What; that | C．That; what | D．That; because |