Many people think it is ____________to keep wild animals in cages.
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They will _______a new model of car at the Motor Show tomorrow.
The old couple prefer to take a _______flight from Chicago to Beijing.
It is __________ for Chinese people to have dumplings on New Year's Eve.
健康男婴，3月，来门诊接受预防接种，他应当接种的是：
A. 脊髓灰质炎疫苗第一次
B. 麻疹第一次
C. 百白破第一次
D. 乙肝疫苗第二次
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