W:I thought you were going to be on the 5:30 train. M:I took the 5:30, but it was so late that it came in alongside the 6:00 train.
A. 20 minutes B. 30 minutes C. 40 minutes
单项选择题Wal-Mart likes to hire managers from other companies.
单项选择题The TapeStare system is popular with big companies because().
A. it costs less than a human operative. B. the information it stores is valuable. C. they know that their data is safe.