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.

NPT3/8表示尺寸代号为3/8的55°非密封管螺纹。( )