III. Choose the best answer
`1`. C ( Why don't we + V)
`2`. D ( Let's + V)
`3`. A( S+ suggest + V-ing )
`4`. D ( Why don't we + V)
`5`. C ( What / How about + V-ing +...)
`6`. D ( Why don't you + V)
Cấu trúc : Ai đó đề nghị làm gì : Let's + V = Shall we + V = What / how about +V-ing = I suggest +V-ing + Why don't we + V?