Up to now, doctors ___ able to do very little to treat this disease.
| A．are | B．will be | C．have been | D．were |
Women ______ drink more than cups of coffer a day have greater chance of having heart disease than those ______ don’t.
| A．who；/ |
| B．/;who |
| C．Who; who |
| D．/;/ |
Mary was much kinder to Jack than she was to others, ______, of course, made all the others upset.
| A．who |
| B．which |
| C．what |
| D．that |
Ted came for the weekend wearing only some shorts and a T-shirt, ______ is a stupid thing to do in such weather.
| A．this |
| B．that |
| C．what |
| D．which |
The prize will go to the writer ______ story shows the most imagination.
| A．that |
| B．which |
| C．whose |
| D．what |
A lot of language learning,______ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
| A．as |
| B．it |
| C．which |
| D．this |