One of the first things Joan did ____ getting home was to water her flowers．
| A．by | B．on | C．at | D．for |
I will work as hard as I can _____ for the final exam.
| A．prepare | B．to prepare | C．preparing | D．prepared |
_____ there are many different interpretations of our body language, some gestures seem to be universal.
| A．When | B．While | C．Because | D．Since |
The speaker raised his voice but still couldn’t make himself _____.
| A．hear | B．to hear | C．heard | D．to be heard |
Theme parks try to make sure that visitors leave _____ more about their theme.
| A．to know | B．knowing | C．know | D．known |
Mother _____ us stories when we were young. 
| A．was used to tell | B．is used to telling | C．used to tell | D．used to telling |