My sister, an inexperienced rider, was found sitting on the bicycle __________ to balance it.
| A．having tried | B．trying | C．to try | D．tried |
Mr. Black, our headmaster,Mary to teach the boy a good lesson,and so he did.
| A．agreed |
| B．permitted |
| C．persuaded |
| D．promised |
So were you in what you were doing that I dared not make any sound when I came in.
| A．curious |
| B．concerned |
| C．absorbed |
| D．focusing |
Green products are becoming more and more popular because they are environmentally.
| A．friendly |
| B．various |
| C．common |
| D．changeable |
Don't the boy's words too seriously.
| A．keep |
| B．make |
| C．take |
| D．think |
---I believe we've met somewhere before.
---No,．
| A．it isn't the same |
| B．it can't be the truth |
| C．I don't think so |
| D．I'd rather not |