The boy with a book in his hand __ to see you since nine o’clock this morning.Can you see him now?
| A．waits | B．had been waiting | C．is waiting | D．has been waiting |
The task _____ more difficult than we expect.
| A．proved to | B．proved us | C．was proved | D．proved |
_____ his happy look, he must have passed the driving test.
| A．To judge by | B．Being judged from | C．Judging by | D．Judge from |
_____ to too much sunlight, as is generally considered, will add to the potential of catching skin cancer.
| A．Being exposed | B．Exposed | C．Exposing | D．To expose |
There was a nice little gift for everyone, with a suitable poem _____ to it.
| A．attached | B．to be attaching | C．to attach | D．attaching |
I’m sorry you’ve been waiting so long, but it’ll still be some time _____ Brian gets back.
| A．before | B．since | C．till | D．after |