Give the correct form of verbs given

Give the correct form of verbs given:
1. My sister and I (stay) .............. at our grand parents' home when we (meet) ......... our great grand aunt for the first time.
2.Did you advise Jane (join) ............... in the Vietnamese speaking contest ?
3.In Viet Nam, it (not snow) ..................... in winter except for Sa Pa and Lang Son.
4.We (always/ make) ................. to work hard by our parents.