increaseto(从...)增加到...(总数量)
increaseby增加(的净值/净百分数)
比如
Mysalarywillincreasefrom$1000to$1100我的薪金将从$1000增加到$1100.
Mycurrentsalaryis$1000.Itwillwillincreaseby$100to$1100我现在的薪金是$1000.它将增加$100到$1100
Mycurrentsalaryis$1000.Itwillwillincreaseby10%to$1100我现在的薪金是$1000.它将增加10%(即$100)到$1100
所以要填B.