–Who has broken the window in my room?
--Who else ___ it but your naughty son!
| A．could do | B．could have done | C．might do | D．must have done |
_____ by the clear waters, this forest provides visitors with a wonderful chance to see some endangered native birds in the wild.
| A．Being surrounded | B．Surrounding |
| C．Surrounded | D．To be surrounded |
The position, however, _____ you are applying, is not quite a well-paid one.
| A．that | B．which | C．for which | D．to which |
— Have you called Mr. Johnson’s office?
— Yes, he _____ back before tomorrow. So he can attend our meeting on time.
| A．expected | B．is expected | C．is expecting | D．is to expect |
Scientists are convincedthe positive effect of laughter_____physical and mental health.
| A．of, at | B．by, in | C．of, on | D．on, at |
If you are unable to attend the interview, for _____ reason, you should inform us immediately.
| A．whatever | B．what | C．whichever | D．which |