_____ into use in April 2000, the hotline was meant for residents reporting water and
heating supply breakdowns.
| A．Put | B．Putting | C．Having put | D．Being put |
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 |
There are about 85% of adults _______ the idea of a ban on smoking.
| A．welcome | B．to welcome |
| C．welcomed | D．welcoming |