—___ __must I take this medicine every day? —Three times a day.A.How longB.How o

—___ __must I take this medicine every day? —Three times a day.A.How longB.How o

题型:不详难度:来源:
—___ __must I take this medicine every day? 
—Three times a day.
A.How longB.How oftenC.How farD.How

答案
B
解析
考查固定搭配。How long问多久How often问频率,多久一次;;How far问多远;How问怎样。根据Three times a day应是问频率,所以选B。
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