单项选择题

The professor _____ the questions to the students already.

A、explain
B、explaining
C、has explained
D、explains
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单项选择题
The students ____ basketball on the playground right now.
A、played
B、play C. plays
D、are playing
单项选择题
The turkey tradition was pushed by ()
A、Franklin Roosevelt
B、Abraham Lincoln
C、George Washington
D、Benjamin Franklin
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