单项选择题

A．Many hours.
B．One full day.
C．Two full days.
D．Three full days.
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单项选择题
A．It’’s time to urge him to study math.B．He himself should make the decision.C．They should help him study math.D．They should leave right now.
A．It’’s time to urge him to study math.
B．He himself should make the decision.
C．They should help him study math.
D．They should leave right now.
单项选择题
Many commercials begin with a cheerful song of some kind because ________.
A．pop songs attract viewer attention
B．it can increase their loudness
C．advertisers want to make them sound different from regular programs
D．advertisers want to merge music with commercials
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