Robert is said ___________ abroad, but I don’t know what country he studied in .
| A．to have studied | B．to be studying | C．to study | D．to have been studying |
The guide showed the travelers _____ of the factory.
| A．in | B．out | C．off | D．around |
We should mind our behaviour ______ public.
| A．at | B．in | C．on | D．out |
Excuse me, I have no ______ on me. Can you _____ the note of 100 yuan ?
| A．changes, charges | B．changes, change |
| C．change,change | D．changed, changed |
They made a bet _____the white horse.
| A．for | B．with | C．on | D．in |
.I was about to leave _____ the telephone rang.
| A．then | B．when | C．that | D．and when |