The teacher told us to remain silent unless _____.
| A．to be asked | B．being asked | C．asked | D．you asked |
32. ________ have the radio repaired，he’d like to buy a new one.
| A．More than | B．Rather than | C．Instead of | D．Other than |
31. I tried to telephone you, but I couldn’t ____________.
| A．look through | B．go through | C．see through | D．get through |
30. They are shocked to find that in this town the traffic rules are not strictly ________.
| A．noticed | B．recommended | C．observed | D．concerned |
29. ---Let’s make it next Monday or Tuesday if it’s convenient for you.
--- _____ day is OK. I’m free all the time.
| A．Some | B．Both | C．Either | D．Neither |
28. It is suggested that the project ______ until all the preparations have been made.
| A．is not started | B．won’t be started |
| C．isn’t to be started | D．not be started |