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1.I usually have dinner at 7 in the evening.
2.They sometimes have a rest in the park.
3.The cadets have their English lesson on Tuesday and Saturday.
4.My friends sometimes have their holiday on board a passenger liner.
5.Jack has a good time at weekends.

 Do they have sometimes a rest in the park.?  Do the cadets  have  their English lesson on Tuesday and Saturday.? 4. Do my friends sometimes have their holiday on board a passenger liner&. 5. Does Jack has a good time at weekends.