根据中文意思完成句子。
1. 六点钟了，该吃晚饭了。
It's six o'clock. __________________ supper.
2. 博物馆很近，为什么不走着去呢？
The museum is quite near. __________________ on foot?
3. 我的电脑坏了，你能帮我修一下吗？
____________________ my computer. Could you help me mend it?
4. 很抱歉让你久等了。
I'm sorry ___________________ for a long time.
5. 他过去玩电脑游戏的时间太多，结果对学习不感兴趣了。
_____________________ he was not interested in his lessons.
