It would be _____ a risk to let the child go to school by himself.
| A．following | B．passing | C．running | D．carrying |
The _____ you study, the _____ you’ll be in it.
| A．hard; interested |
| B．harder; interesting |
| C．harder; more interested |
| D．hardest; more interested |
You’d better go there by train. The train ticket is _____ the plane ticket.
| A．as cheap three times as |
| B．as three times cheap as |
| C．three times cheaper than |
| D．cheaper three times than |
She brought with her three friends, none of _____ I had ever met before.
| A．them | B．who | C．whom | D．these |
_______ ambassador who did his best to prevent the war is of _______ benefit to the place.
| A．An; 不填 | B．The; a |
| C．The; 不填 | D．An; a |
I will never forget those days, ______ I spent in the countryside together with my grandmother as a child.
| A．when | B．which | C．on which | D．in which |