______ wake up your sister, Ben. She needs a good sleep.
| A．Don’t | B．Doesn’t |
| C．Aren’t | D．Can’t |
Smoking is bad for health, so the doctor advised my father _____.
A. not smoke B. not to smoke C. not smoking
______ excellent singer she is !
A. What B. What an C. How
It has been five days ______ the little girl left home.
A. since B. after C. until
The man makes a living teaching.
A. for B. with C. by
The only language ____ is easy to learn is mother tongue.
| A．which | B．that | C．/ | D．it |