The path to dreams may not be smooth and even at great cost, but ______ on to them.
| A．keep | B．go | C．hold | D．pass |
In Hangzhou, Mr. Black was so struck ______ the beauty of nature that he stayed
________ another night.
| A．at ; on | B．with ; at | C．for ; in | D．by ; for |
It is morning _____ we have four classes, not afternoon.
| A．when | B．which | C．that | D．why |
Mother told Jim to watch the milk until it boiled and then _________ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
The idea puzzled me so much that I stopped for a few seconds to try to _______.
| A．make it out | B．make it off | C．make it up | D．make it over |
----Will you be ____ this afternoon , John?
----It depends. I’ m afraid I’ll be called in by my boss.
| A．suitable | B．available | C．accurate | D．convenient |