In class the teacher’s humorous words often make every student ____ laughter.
| A．burst into | B．break into | C．fall into | D．come into |
The aging population _____ each day .There must be some kind of interesting activity for the old.
| A．has grown | B．grew | C．will grow | D．is growing |
When I ______to take part in the sport, I felt very surprised because I had never done this before.
| A．was chosen | B．chose | C．has been chosen | D．had chosen |
I asked her ______ I should do to lose weight, and she told me to balance my diet.
| A．why | B．that | C．what | D．how |
— Do you know the old man ______ on the bench over there?
— He is my grandfather.
| A．sit | B．sat | C．to sit | D．sitting |
If you don’t learn to think _____ you are young, you may never learn.
| A．when | B．where | C．what | D．which |