When a pencil is partly in a glass of water, it looks as if it _______.
| A． breaks | B．has broken | C．were broken | D．had been broken |
To his mind, the collaborative development of Beijing, Tianjin and Hebei province is to solve the problems _____ Beijing faces, such as overpopulation, traffic jams, and etc.
| A．that | B．whether | C．when | D．why |
The houses for the low-income families _______ at present in our city will be completed next year.
| A．to be built | B．built |
| C．being built | D．having been built |
He spared no efforts to make himself _______ but failed.
| A．understand | B．understanding | C．understood | D．to understand |
Jack, look! Everybody is doing homework quietly. ______ you make a noise in class?
| A．Could | B．Shall | C．Will | D．Must |
You’d better not leave the medicine_______ kids can reach it.
| A．who | B．where | C．which | D．when |