It can_____(21)on both our physical and mental health and can lead to other health_____(22)
A. demands
B. concerns
C. reasons
D. questions
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李某在航班离站前16小时退票，这时他需要支付()退票费。
A. 5％
B. 10％
C. 20％
D. 50％
it is first necessary to allow a sufferer to re-experience_____(29)real relaxation feels lik
A. if
B. how
C. where
D. what
在函正文的结尾处，可以使用的语句是()。
A“请尽快函复为盼”
B“敬请予以大力支持”
C“请即函复”
D“特此函告”
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