Nowadays many volunteers are working in areas ______ have dry climates, such as Kenya and Sudan.
| A．where | B．who | C．which | D．what |
He was ill. _____ is why he didn't attend the meeting.
| A．This | B．It | C．There | D．That |
Will he come back to school tomorrow? I hope _____.
| A．that | B．this | C．so | D．it |
The students encouraged _____ to go on.
| A．one after another | B．one another | C．the other | D．one by one |
-- Who broke the glass?
- I suppose _____ must be one of the children.
| A．the one | B．he | C．it | D．who |
She cut the cloth with _____ scissors.
| A．a couple of | B．a pair of | C．two | D．a |