There is a common belief among the students in our school ______ they should make great efforts to learn and reach the peak of their academic performances.
| A．which | B．if | C．that | D．whether |
As we came to the work site, the workers were seen _______the new house.
| A．building | B．build | C．built | D．to build |
. The reason for all the changes being made _______to us yet.
| A．has not explained | B．has not been explained |
| C．did not explained | D．were not explained |
24. You ought to have put the milk in the refrigerator, and now ________sour.
| A．it smell | B．it is smelt | C．it smells | D．it is smelling |
Tim ________since he lost his job three weeks ago.
| A．had been unemployed | B．was unemployed |
| C．has been unemployed | D．has unemployed |
– “Have you moved into the new flat?”
“Not yet. The room ________.”
has been painted B. is painted C. paints D. is being painted