When I got up early the next day , I found the air on the hill good ___________
| A．breathe | B．to be breathed | C．to breathe | D．breathing |
Plastic and rubber won’t _________ electricity,but copper will.
| A．have | B．do |
| C．pass | D．conduct |
________ no need for everybody to discuss the problem again since it has already been solved.
| A．It has | B．There has | C．We have | D．There is |
I didn't like aunt Lucy,who __________ without warning and bringing us presents.
| A．always turned up |
| B．has always turned up |
| C．had always turned up |
| D．was always turning up |
You'd better get all the work _________ before you leave.
| A．finishing | B．to finish |
| C．finished | D．be finished |
At midnight the enemy attacked _________.
| A．without warning | B．without notice |
| C．without permission | D．A or B |