By the middle of the 21st century, the vast majority of the world’s population _____ in cities rather than in the country.
| A．are living | B．will be living | C．have lived | D．will have lived |
You must learn to consult your feelings and your reason ________ you reach any decision.
| A．although | B．before | C．because | D．unless |
（2013·大纲卷）I was glad to meet Jenny again, I didn't want to spend all day with her.
| A．but | B．and | C．so | D．or |
The only way to succeed at the highest level is to have total belief_____ you are better than anyone else on the sports field.
| A．how | B．that | C．which | D．whether |
（2013·新课标Ⅱ卷) I was glad to meet Jenny again, I didn't want to spend all day with her.
| A．but | B．and | C．so | D．or |
There’s no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
| A．since | B．if | C．as | D．while |