People try to avoid public transportation delays by using their own cars, and this ____ creates further problems.
| A．in turn | B．on contrary | C．in return | D．by turns |
On weekends the Smiths usually drive to the countryside and ________ the fresh air there.
| A．take off | B．take up | C．take out | D．take in |
In face of the challenge for the moment, it’s most important to ______ a good state of health.
| A．keep up | B．keep away | C．keep off | D．keep out |
Fully ________ in my office work, I have little time for housework.
| A．occupy | B．occupied | C．occupying | D．to occupy |
Nancy reminded me of what I should ________ have forgotten.
| A．therefore | B．instead | C．otherwise | D．besides |
Helen borrowed my book _______, saying that she would return it soon.
| A．day in and day out | B．day by day |
| C．some other day | D．the other day |