10. 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 |
7. When you read the book, you’d better make a mark ______ you have questions.
A.at which |
B.at where |
C.the place where |
D.Where |
6. _________, I attended the meeting instead of him last week.
A.He was ill |
B.His being ill |
C.He being ill |
D.Him being ill |
5. The day breaks, _______ the birds are singing.
A.for |
B.because |
C.since |
D.As soon as |
4. It used to ______ that humans and animals were different and had little in common.
A.believing |
B.be believed |
C.believe |
D.Believed |
3. Remember, Peter, when you learned to drive a car? ______ you drove more, you got better and better. It’s the same with Chinese study.
A.Although |
B.While |
C.As |
D.Unless |