What’s the________ of this word “sorrow” —It _______ “sadness”.

There have been no buses _______ half an hour.

I wonder if I _____ smoke here.— No, you ______ . Couldn’t you see the sign “NO SMOKING” on the wall?[ ]

All the students in my class ________ those heroes and decided to learn from them.

Before our study we did not have data that could tell us __ those changes were small or large .