The teacher asked the two students to discuss the question in a low voice they should bother the others.
A. so that
B. in case
C. in order that
D. now that
网友回答
A. so that
(答案→)B. in case
C. in order that
D. now that
解析：考查连词辨析。A以至于；B以防；C为了；D既然；结合句意可知B正确。句意：以防他们会干扰别人，老师让那两个学生小声讨论问题。