Hoàn thành câu với các từ đã cho

1. It/take/about 30 minutes/do/exerscise

2. I/used/go/work/bike/when/i/be/child

3.He/go/picnic/friend/last summer

4. We/reduce/use/electricity/save/our energy

5. At 10 pm next month,we/visit/grandparents

6. You/turnoff/lights/before/go/out