At present there is a fierce debate over the question_______ human cloning should be allowed.
| A．that | B．whether | C．what | D．if |
The valley was so deep that it had been ten seconds _________the stone feel off to the bottom.
A sinceB before C whenD until
Many Chinese universities provide scholarships for students __________ financial aid.
A in favor ofB in honor ofC in face ofD in need of
The fire which happened in the CCTV’s new building has raised _______about the safety of using fireworks in cities.
A attentionB expectationC concernD standard
The law may please some, but not ________?
A. at allB. anyC allD every
To make the city look more beautiful, a lot of old houses along the street have been _____.
| A．brought down | B．put down | C．turned down | D．pulled down |