英语专业四级模拟训练题之词汇语法单选题 16
1.circus tigers, although they have been tamed, can ___ attack their trainer.
a.unexpectedly
b.deliberately
c.reluctantly
d.subsequently
answer 答案
2.the tourist is prevented from entering a country if he does not have ___ passport.
a.an operative
b.a valid
c.an efficient
d.an effective
answer 答案
3.the plane is about to take off. would you please ensure that your seat belt is securely ___?
a.locked
b.bound
c.tied
d.fastened
answer 答案
4.though working for the old, he paid ___ visits to his own parents.
a.scare
b.rare
c.insufficient
d.inadequate
answer 答案
5.stressful environments lead to unhealthy behaviors such as poor eating habits, which ___ increase the risk of heart disease.
a.in turn
b.in return
c.by chance
d.by turns
answer 答案
答案解析
1.[a]【解析】副词词义辨析。unexpectedly意为“出乎意料地，意外地”。deliberately意为“故意地”；reluctantly意为“不情愿地”；subsequently意为“后来，随后”。句意：马戏团的老虎虽被驯服，但有时也会出乎意料地袭击驯兽员。
2.[b]【解析】形容词近义词辨析。operative意为“起作用的，生效的”；valid意为“（法律上）有效的，正当的”；efficient意为“效率高的”；effective意为“起作用的，有影响的”。句意：游客如果没有有效护照不得入境。
3.[d]【解析】动词近义词辨析。lock意为“用锁关上或紧闭”；fasten意为“把……结牢；把……拴住；扣紧（纽扣）”；tie意为“捆，系，拴”；bind 意为“缚，绑”。句意：飞机马上要起飞了。请检查一下您的安全带是否已系好。
4.[b]【解析】形容词近义词辨析。scarce意为“缺乏的，不足的”；rare意为“稀有的，罕见的；不常发生的”；insufficient意为“不够的，不足的”；inadequate意为“不充分的”。句意：虽然他从事老年人工作，但他却很少去看望他的父母。
5.[a]【解析】介词与名词固定搭配。in turn意为 “轮流地，挨个，依次；反过来”；in return意为“回报的，作为回报”；by chance意为“偶然地”；by turns意为“轮流地。时而……时而”。句意：有压力的环境会导致对健康有害的行为，例如不良的饮食习惯；反过来，这样的不良习惯又会增加患心脏疾病的风险。