There is plenty of rain in the southeast, there is little in the northwest.
| A．because | B．therefore |
| C．while | D．as |
In some languages,100 words make up half of all words ________ in daily conversations.
| A．using | B．to use |
| C．having used | D．used |
Volunteering gives you a chance________lives，including your own.
| A．change | B．changing |
| C．changed | D．to change |
________which university to attend，the girl asked her teacher for advice.
| A．Not knowing | B．Knowing not |
| C．Not known | D．Known not |
________ in the early 20th century，the school keeps on inspiring children’s love of art.
| A．To found | B．Founding |
| C．Founded | D．Having founded |
________warm at night，I would fill the woodstove，then set my alarm clock for midnight so I could refill it.
| A．Staying | B．Stayed |
| C．To stay | D．Stay |