21. Due to frequent layoffs, there is anxiety among the employees ________ they may one day be out of work.
A. when B. how C. why D. that
22. Nowadays many parents tend to be tolerant ________ their children’s choices of majors at university.
A. as a consequence of B. regardless of
C. in regard to D. at the mercy of
23. Mary worked here as a ______ secretary and ended up_____ a full-time job with the company.
A. admirable; getting B. temporary; getting
C. previous; to get D. cautious; to get
24. It was obvious that there was ________ between accounts of the witnesses for the murder case, so the judgment was not announced in court.
A．security B．relation C．conflict D．Revision
25. —Life ____ be very hard for people living in the north of Canada as it is very cold there in the winter.
—Yes, the weather there ____ be as low as 60°C below zero.
A.must; can B. shall; must C. will; should D. should; can
