Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.
| A．likely | B．possible | C．probable | D．sure |
—What about ________ lecture you attended yesterday?
—To tell the truth, it was too boring.I can't stand ______ lecture like that.
| A．a; the | B．the; a |
| C．the; 不填 | D．the; the |
The early 1950s was still________ time when girl's education was always placed________ second to boy's.
| A．the; / | B．a; the | C．a; / | D．/; the |
（2013•新课标全国卷Ⅱ） Four and ________ half hours of discussion took us up to midnight，and ________ break for cheese，chocolate and tea with sugar.
| A．a; a | B．the; the | C．/; the | D．a; / |
The emergency center is in great need of O-type blood，but there is__________ at hand.
| A．nothing | B．none | C．any | D．much |
(2014届山东省潍坊市高三3月模拟考试英语试卷）
It suddenly occurred to me I hadn’t locked my door．
| A．which | B．where | C．that | D．whether |