1-C. Well, I don't think traveling around by train is necessarily a waste of time.Well, I don't think traveling around by train is necessarily a waste of time.
まあ、私は、思いません、周遊旅行することが、電車でダヨ、必ずや無駄であるとダヨ、時間のダヨ。
2-C. That's a waste of time.That's a waste of time.
それは、無駄です、時間のダヨ。
3-C. Fred: There's little point in even trying. It'd be a waste of time.Fred: There's little point in even trying. It'd be a waste of time.
4-C. Some of his students have complained about his jokes being a waste of time, His colleagues also have advised him not to spend so much time writing jokes.Some of his students have complained about his jokes being a waste of time, His colleagues also have advised him not to spend so much time writing jokes.
5-C. This passage as a whole shows that effective time management helps us avoid wasting time.This passage as a whole shows that effective time management helps us avoid wasting time.
6-C. If artists, including opera singers, lack the support they need, valuable talent is wasted.If artists, including opera singers, lack the support they need, valuable talent is wasted.
7-C. (2) I really hate to see food wasted, so I always try to eat everything on my plate.(2) I really hate to see food wasted, so I always try to eat everything on my plate.