We must keep the classroom ___________.
| A．clean | B．to clean | C．cleaning | D．cleaned |
If you keep on working hard, I have no doubt ______ you’ll be successful in the future.
| A．whether | B．when | C．that | D．If |
My father has never been to school, so he can ________ read _______ write.
| A．hard, or | B．hardly, or |
| C．hard, and | D．hardly, but |
She devoted as much time as she could ____________ others.
| A．help | B．helped | C．to helping | D．Helping |
Sam is a little weak in English and he has _____ what the teacher says in class.
| A．difficult to understand |
| B．difficult understanding |
| C．difficulty to understand |
| D．difficulty understanding |
______ great fun they had singing and dancing last Sunday night!
| A．How a | B．What a | C．How | D．What |