题干
Let's ________ the old woman ________ the housework today.
A：to help; to do
B：help; do
C：help; with do
D：to help; doing
答案(点此获取答案解析）
B
Let's ________ the old woman ________ the housework today.
A：to help; to do
B：help; do
C：help; with do
D：to help; doing
