占上中下三格小写字母是______.

Mary is going to quit her job because she is tired of _____ by her boss every day. [ ]

It’s wise to find a place to travel ______ has a lot to present but hasn’t yet been hit by high price of admission as well as mass popularity．

We have so many kinds of guitars for you ________.

Why not try your luck downtown, Bob? That’s ________ the best jobs are