—What worried him so much?
—His hair is __________ grey.
| A．going |
| B．becoming |
| C．turning |
| D．staying |
Knowing office rules—whether _____ or not—is critical, especially for young job seekers.
| A．written | B．writing |
| C．being written | D．having been written |
For a long time they walked without saying _____ word. John was the first to break _____ silence.
| A．the; a | B．a; the | C．a; / | D．the; / |
Readers have been making good comments on the book, but _____ actual sales, it is still far from satisfactory．
| A．by means of | B．in place of | C．in terms of | D．in line with |
—Which is the computer you want to _____?
—The one over there.
| A．have repaired | B．have it repaired |
| C．have repair | D．repair it |
Don’t start reading a book _____ you find that it’s one you can read with ease and understanding.
| A．when | B．if | C．unless | D．Though |