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computer science
…
easy
which
interesting
subject
difficult
best
容易的
有趣的
难的，艰难的
哪一个
学科；主题
最好地（的）
Example:
A: They are learning about the past in the class. What class are they having?
B: They are having a history class.
learning about the past
了解过去
A: They are _________________ in the class. What class are they having?
B: They are having a _________ class.
singing and dancing
drawing pictures
singing and dancing
music
drawing pictures
n art
working on math problems
解数学题