He is ill. I don’t know _______ he will come to school.
| A．how | B．weather | C．when | D．whether |
You should try your best ____ your English.
| A．to improve | B．improving | C．improves | D．improve |
Because of the rain, we must ________ holding the sports meeting.
| A．give up | B．take off | C．put off | D．give away |
An accident ________ on Zhongshan Road yesterday afternoon.
| A．has been happened | B．was happened | C．is happened | D．happened |
Jack wanted to read more, so he asked his friend if there was ________ to read.
| A．something easy enough | B．something enough easy |
| C．enough easy something | D．easy enough something |
So far, the moon ________ by man already.
| A．is visited | B．will be visited | C．has been visited | D．was visited |