27. Generally speaking, you should arrive at the airport with plenty of time __________.
A)sparing
B) to spare
C)spare
D) spared
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28. In most cases, panel interviews were_________than those held by single interviewers.
A) more reliable
B) reliable
C) most reliable
D) least reliable
29. They opened a new store in our city, but not until last week__________it
A) we visited
B) we would visit
C) did we visit
D) have we visited
30. If I were you,I__________job-hunting by visiting the websites of these companies.
A)will start
B) had started
C)start
D) would start
Section B31. Training new staff should (conduct) ____ as soon as possible after they are hired.