The first decade in the 21st century is the one ______ many significant advances are made in China

Excuse me, sir. Would you do me afavor— Of course. What is it— I _____ if you could tell me how tofill out this form.

More are ________ in the countryside when their parents floodinto the cities for jobs.

The order of DNA chemicals ________ whether a child has her mother’s eyes or her father’s smile.

It is unbelievable that Mr. Lucas leads a simple life __his great wealth.