He was busy writing a story，only _________ once in a while to smoke a cigarette．
| A．to stop | B．stopping |
| C．to have stopped | D．having stopped |
相关试题
If a person has not had enough sleep, his actions will give him _____ during the day.
| A．away | B．up | C．in | D．back |
The good thing about children is that they_____very easily to new environments.
| A．adapt | B．appeal | C．attach | D．apply |
The building around the comer caught fire last night. The police are now _____the matter.
| A．geeing through | B．working out | C．looking into | D．watching over |
Don’t be so discouraged. If you ________such feelings, you will do better next time.
| A．carry on | B．get back | C．break down | D．put away |
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