sometimes, like all airlines, due to commercial pressure we have to oversell fights. occasionally we miscalculate and have to downgrade passengers to a lower class — for example from first to business class or business to economy.
obviously passengers arent happy about this at all.
the opposite thing is an upgrade.
passengers may request an upgrade for countless reasons — for anything that has happened to them in the past and they perceive that british
★外语资源世界(qq:18469114/85652770) ★
【篇三：体验商务英语综合教程4 课本答案】
txt>1—5: a a a a a
unit 3
p23 vocabulary
a
positive meaning: build up, cement, develop, encourage, establish, improve, maintain, promote, restore, resume, strengthen negative meaning: the rest！！！！！
b
very badvery good stormy strained coolamicable friendly close excellent
c
1—5: e d b a e
p26 languagea
a---j: 9 3 2 4 8 1 5 7 10 6b
1—5 get on count on build up hold on to put(it) off 6—10 sounded out let(us)down set up draw up call(it)off
unit 4 p33
language review
1—4: present simple past simple present continuous present perfect p34
vocabulary c
1—5: overtook outstripped outbid outvote outmaneuvered 6—10: outnumber overbookedoverran overcharged oversubscribed
p40
vocabulary
a 2—4: e
b f h 6—8: g
c d