When there is a fire,we have to learn＿＿＿ to callWhen there is a fire,we have to learn ＿＿＿ to call the fire ststion and ＿＿＿ to do．A．how；how B．what；howC．what；what D．how；what
问题描述：
When there is a fire,we have to learn＿＿＿ to call
When there is a fire,we have to learn ＿＿＿ to call the fire ststion and ＿＿＿ to do．
A．how；how B．what；how
C．what；what D．how；what
答