You’d sound a lot more polite if you make a request _____ a question．
| A．in search of | B．in the form of | C．in need of | D．in the direction of |
After that earthquake last year, we had to start ______ scratch rebuilding our houses.
| A．of | B．from | C．in | D．up |
__________ is responsible for the Chenzhou train collision will be punished.
| A．Whatever | B．No matter what | C． Whoever | D．No matter who |
When report came into London Zoo ______ a wild lion had been spotted forty-five miles south of London, they did not take it seriously. 
A. which B. where C. that D and
Only when he returned ___________ that the war had ended and the army had come back.
| A．we tell | B．we told | C．did we tell | D．were we told |
Nowadays more young people have suffered from diabetes __________ it is generally realized.
| A．than | B．that | C．which | D．what |