1.They will come back in two weeks.(画线部分是in two weeks)
2.We go to see the old men twice a month.(画线部分是 twice a month)
3.He studies English hard.(画线部分是hard)
5.They met each other at the gate of our school.(画线部分是at the gate of our school)
6.LiMing is going to help me with my English.(画线部分是LiMing)