【简答题】A.They are frustrating to use. B.They are expensive to operate. C.They can cause companies to lose business. D.They can be very convenient sometimes.
【简答题】You want to run across the street to catch the bus which is leaving soon? But 1 ! You’d better not. If a policeman sees you, you’ll have to pay a fine (罚款). New traffic laws (交通法) say that 2 people cr...