It is not easy to decide how ___ to tip waiters or taxi drivers.A.often B.many C.soon D.much

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It is not easy to decide how ___ to tip waiters or taxi drivers.A.often B.many C.soon D.much
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It is not easy to decide how ___ to tip waiters or taxi drivers.A.often B.many C.soon D.much
It is not easy to decide how ___ to tip waiters or taxi drivers.A.often B.many C.soon D.much

It is not easy to decide how ___ to tip waiters or taxi drivers.A.often B.many C.soon D.much
D
给多少钱服务员或出租车司机不容易决定.
分析 how often 问频率‘ 多久一次’
how many 多少(后接可数名词复数)
how soon 过多久
加油!不明白再问!