12.It took us over an hour_______along the street.
| A．walk | B．to walk | C．walking | D．walked |
It is reported that large amounts of moneyspent on the bridge so far.
| A．was | B．has been | C．were | D．have been |
The reasonhe explained for his being late ishe got up late.
| A．why, that | B．that, that | C．for which, because | D．that, because |
If he keeps on working so hard, he will sooner or later.
| A．break off | B．break up | C．break out | D．break down |
all the snow in the valley, the cabin still remained warm and comfortable.
| A．Despite of | B．In spite of the fact | C．Despite | D．Although |
You are notto smoke in the hospital.
| A．known | B．supposed | C．regarded | D．considered |