单项选择题

The pyramids were built ______.

A．before the Egyptians developed a sophisticated technology
B．after the Egyptians developed a sophisticated technology
C．to house the tombs of all ancient Egyptian kings and nobles
D．to keep mummies safe forever

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热门试题

单项选择题

The main aim of the speaker is to ______.

A．explain the derivation of the word "tip"
B．illustrate why difficult customers give bad tips
C．put forward reasons for a salary increase
D．indicate how one can get better service

单项选择题

Usually waiters and waitresses expect their tip to be ______.

A．25% of the bill
B．15% of the bill
C．50% of the bill
D．20% of the bill