赞题库-背景图
单项选择题

A．He’s preparing for a test.
B．He lost his notes.
C．He missed the class.
D．He’s studying this subject.
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热门试题

单项选择题A．Less than 15 hours.B．15 Hours on average.C．Up to 20 hours.D．30 hours at most.

A．Less than 15 hours.
B．15 Hours on average.
C．Up to 20 hours.
D．30 hours at most.

单项选择题A．They are more convenient.B．Their storage space is more accessible.C．They are more energy-efficient.D．They take up less floor area.

A．They are more convenient.
B．Their storage space is more accessible.
C．They are more energy-efficient.
D．They take up less floor area.