At present we have no __________ of life on otherplanets.
| A．entrance | B．evidence | C．decision | D．suggestion |
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 |
27. How can you expect him to make any progress ____ you never give him a chance to have a try?
| A．when | B．unless | C．even though | D．until |
26. They got married 30 years ago and never ______ in the past years.
| A．they didn’t quarrel | B．they have quarreled |
| C．did they quarrel | D．have they quarreled |