I think this software is of little use to your work. It is really a ________ of money.
| A．lack | B．load |
C．question | D．waste |
The boys were happily making a snowman, _________ with cold.
| A．their faces red | B．their faces were red |
| C．their faces to be red | D．their faces turned red |
________ the prices and functions of different types of computers before you make up your mind which to buy.
| A．To compare | B．Comparing | C．Compared | D．Compare |
-- Are you fond of watching TV?
--- Not a bit. I would sit alone in the dark _______ I would watch TV.
| A．before | B．if | C．while | D．after |
--- Does Li Hua serve in the army?
---No, but he________ in the army for three years.
| A．served | B．has served | C．is serving | D．would serve |
Nothing is so easy as ________ parents to raise their expectations of their children too high.
| A．of | B．for | C．by | D．to |