As a teacher, you should not _______ the students from asking questions in class.
B
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When traveling alone in the mountains, you ’d better take a _______ with you in case you get lost.
Withthehelpofthegovernment,alargenumberofpeople---_______afterthefloodin1991.
Healwayshasalotof_______ideasinhismind,andsometimeswedonotevenknowwhatheisthindingabout.