Peter watches TV for an hour every day.[对for an hour提问] [ ][ ] does Peter watch TV every day

问题描述:

Peter watches TV for an hour every day.[对for an hour提问] [ ][ ] does Peter watch TV every day

How long

for an hour是(动作经历了)一个小时, 所以提问用: How long; 即:
How long does Peter watch TV every day?