男孩看见妈妈时,便立刻跑向了她.我妈妈总是很忙,因为她下班后得做家务.1．男孩看见妈妈时,便立刻跑向了她.（根据汉语完成句子）When the boy saw his mother,he ( ) ( ) ( ) her at once.2．我妈妈总是很忙,因为她下班后得做家务.（同上）My mother is always busy because she has to ( ) ( ) ( ) after work.3．I don't know.When does the drawing lesson begin?（合并成一个句子）I don't know when ( ) ( ) ( ) ( ).第二题不用回答了

男孩看见妈妈时,便立刻跑向了她.我妈妈总是很忙,因为她下班后得做家务.
1．男孩看见妈妈时,便立刻跑向了她.（根据汉语完成句子）
When the boy saw his mother,he ( ) ( ) ( ) her at once.
2．我妈妈总是很忙,因为她下班后得做家务.（同上）
My mother is always busy because she has to ( ) ( ) ( ) after work.
3．I don't know.When does the drawing lesson begin?（合并成一个句子）
I don't know when ( ) ( ) ( ) ( ).
第二题不用回答了