---How are you prepared for the new project?
---We have done much but a lot of equipment ______.
| A．is remained to buy | B．are remained to buy |
| C．remains to be bought | D．remain to be bought |
Waste paper, waste glass, and waste iron can all be _____.
| A．made | B．taken | C．recorded | D．recycled |
Food supplies may ________ towards the end of the trip, so we can’t waste any food.
| A．run out | B．run up | C．run in | D．run away |
Be ____ to finish your homework before supper.
| A．shy | B．sure | C．nervous | D．serious |
His proposal is very _____. We do not need any explanation.
| A．abstract | B．faithful | C．loyal | D．concrete |
— I stayed at a hotel while in New York .
— Oh , did you ? You ____ with Barbara .
—
| A．could have stayed | B．could stay | C．would stay | D．must have stayed |