You know he is not going to let us leave early if we __________ get the work done.
| A．can’t | B．may not |
| C．shouldn’t | D．mustn’t |
. I could just see a car in the distance, but I couldn't _____ what color it was.
| A．look out | B．make out | C．get across | D．take after |
The worker agreed to _____ the strike if the company would satisfy their demands.
| A．call for | B．call forth | C．call off | D．call up |
The managing director took the _____ for the accident, although it was not really his fault.
| A．guilt | B．charge | C．blame | D．accusatio |
. More than one-third of the Chinese in the United States live in California, _____ in San Francisco.
A. previouslyB. predominantly C practicallyD. permanently
No one has _____ been able to trace the author of the poem.
| A．still | B．yet | C．already | D．just |