The energy is ________ makes the cells able to do their work.
| A．that | B．which | C．what | D．such |
My house is very _____ for getting to work as it is only a few minutes from the station.
| A．comfortable | B．suitable | C．convenient | D．available |
It was with great delight that I read in your February _____ the letter to the Editor written by Prof. Johnson.
| A．issue | B．printing | C．magazine | D．copy |
The writer was always looking for suitable _____ to use in his next story.
| A．contents | B．articles | C．notions | D．ideas |
Be careful how you _____ that jug, it will break very easily.
| A．pour | B．operate | C．handle | D．employ |
The family is a cooperative enterprise for which it is difficult to _____ rules, because each family needs to work out its own ways to deal with its own problems.
| A．set up | B．put down | C．keep up | D．lay down |