People who get less than six hours of sleep per night have an increased _____ of dying early．
| A．custom | B．practice | C．disadvantage | D．risk |
Is there enough time ___ now? Yes, take it easy.
| A．leaving | B．being left | C．left | D．having been left |
I ___ get on the bus when I heard someone calling me from behind.’
| A．was to | B．was going to | C．would | D．was about to |
See the clouds! It ___ rain.
| A．will | B．is going to | C．must | D．certainly |
The air holds the feather back more than it ___ the stone.
| A．holds | B．do | C．has | D．does |
Do make sure that you ___ a seat today!
| A．got | B．get | C．should get | D．have got |