This machine is very easy _______. Anybody can learn to use it in a few minutes.
| A．operating | B．to be operating | C．operated | D．to operate |
34. “I’d like to give my thanks to those__________help my son will be able to survive his terrible disease,” said the woman on TV.
| A．who | B．that | C．with whose | D．with their |
33. You can, __________ the sky is clear, see as far as the old temple on top of the mountain, but not today.
| A．when | B．where | C．though | D．Because |
20. It was already 11 o’clock in the evening_____they arrived at the hotel.
| A．when | B．before | C．that | D．Since |
19. I don’t want to see him. His ______ to me is always rather cold.
| A．opinion | B．behavior | C．action | D．Attitude |
18. You may give this message to________is in the office.
| A．who | B．easy | C．modern | D．certain |