I know “time is knowledge”, but I never seem to have enough of ____. So I am working hard to save them.

There are five people in the room, but I know _____.

______ is often the case is that Tom doesn’t study hard and fails in passing an exam.

-----How many elephants have you seen? ----                    .

I just choose a simpler life style, ______________ where I can ride my bike all over and do not have to make a great living to survive.