The book, mainly ________ use in college, is a bestseller this summer.[ ]

There is no need for you to go on a diet; you are only slightly overweight ______ your height.

I listened carefully to his long boring speech, but could not ___ what he was talking about．

How did you sleep last night— Like a log. Never slept ________.

a superstar in environmentprotection, reduces plastic and other _______ through DIY