Mrs Brown gave him her new address so that he ___be able to find her easily.would/must
问题描述：
Mrs Brown gave him her new address so that he ___be able to find her easily.would/must
答
填 would 表示过去将来时
Mrs Brown gave him her new address so that he would be able to find her easily.
布朗夫人给了他她新的住址,以便他能够轻易找到她.