单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．About four days.
B．About three days.
C．About two days.
D．About one day.
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单项选择题
A．Because it can send email.B．Because it offers online discussion.C．Because it is visible and audible.D．Because it provides chatting servic
A．Because it can send email.
B．Because it offers online discussion.
C．Because it is visible and audible.
D．Because it provides chatting servic
单项选择题
A．To choose some courses for their children.B．To help them read online.C．To tell children to work hard.D．To show respect to children’s interest.
A．To choose some courses for their children.
B．To help them read online.
C．To tell children to work hard.
D．To show respect to children’s interest.
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