She is said _____in the United States for four years before she came back to work in our company.
| A．to study | B．to be studying |
| C．to have studied | D．studying |
Why are you so anxious? It isn’t your problem _____.
| A．on purpose | B．in all | C．on time | D．after all |
If a person has not had enough sleep, his actions will give him_____during the day.
| A．away | B．up | C．in | D．back |
It is often said that the joy of travelling is______in arriving at your destination _____in the journey itself.
| A． ; but | B．/ ; or | C．not; or | D．not; but |
Don’t be______by products promising to make you lose weight quickly.
| A．taken off | B．taken out | C．taken away | D．taken in |
You don’t have to know the name of the author to find a book. You______find the book by the title.
| A．must | B．need | C．can | D．would |