问题补充：
In the US, students can do almost anything they want in class, they don’t make too much noise or disturb others who want to learn from the teacher.
A. even though
B. now that
C. so that
D. as long as
答案：
A. even though
B. now that
C. so that
(答案→)D. as long as
解析：连词辨析。A即使；B既然；C以至于；D只要；结合句意可知D正确。句意：在美国学生在教室里可以做任何一件事情。只要他们不要发出太大的噪音或者影响别的那些想学习的学生。
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