单项选择题

The last paragraph implies that ______ the importance of protecting the earth.

A．only on Earth Day do people realize
B．people in the world have begun to realize
C．people in the world are well aware of
D．Europeans are not aware of

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热门试题

单项选择题

Normally a student would at least attend ______ classes each week.

A．36
B．12
C．20
D．15

单项选择题

A student can get a free folder ______.

A．when he opens an account
B．if he opens an account this month
C．if he accepts the bank's help
D．once he has arranged his timetable