题目内容：

1、I often( )an old man on my way home last month.
A、meet B、met
2、The question is so difficult ( ).they don't know ().
A、to answer、how to do
B、to answer it、what to do
C、to answer、what to do
D、to answer it、how to do it

优质解答

1 B 一般过去时（ LAST MONTH 上个月,不要受OFTEN的影响哦）
2 C
分析：宾语已提前,排除B与D,而HOW 是疑问副词,不能作宾语,再排除A
加油!不明白再问!