If you find yourself _____ no one will help you, please call me．
| A．where | B．when | C．which | D．what |
—I’m going to Thailand this summer holiday.
—
| A．Take care! | B．Write to me. |
| C．Have a nice trip! | D．When will you come back? |
She always come to our help when we get into trouble ____ she is very busy.
| A．since | B．once |
| C．even if | D．so that |
He has three brothers, ________is a doctor.
| A．all of them | B．all of who |
| C．none of whom | D．both of them |
As teenagers of the 21st century, we should be ready to _____ the challenge of society.
| A．put | B．do |
| C．make | D．meet |
The reason _____ they held a party was _____ it was Sue’s birthday.
| A．why; because | B．why; that |
| C．that; that | D．that; because |