To me, cycling at ___ altitude of more than 4,000 meters was _____ unforgettable experience.
| A．the; an | B．an; an | C．/; a | D．an; / |
We must take two aspects into consideration, both of __________ associated with the safety of the students .
| A．which | B．whom | C．that | D．them |
It was early morning in London _____ Prime Minister Cameron arrived to give his speech.
| A．where | B．when | C．before | D．that |
—I've got a bad cold．Can I take two days ____, Mr．Cage?
—Yes, by all means．Take care．
| A．in | B．on | C．away | D．off |
—What do you think of that housewife?
—She is _____ of a good housekeeper, for the children’s room is always a terrible mess.
| A．nobody | B．somebody | C．nothing | D．something |
It is uncertain side effect the medicine will bring about , though about one thousand patients have taken it.
| A．that | B．whether | C．what | D．how |