Anyone, whether he is an official or a bus driver, should be       respected.

They’re ______ choosing a cautious policy in order to avoid a risk in such an important event.

I’m certain David’s told you his business trouble. ________, it’s no secret that he owes a lot of money to the bank..

In the TV ad, the actress is asked to jump with her mouth ________ open, showing her ________ teeth.

We often say that something is “as light as air”, but air is＿＿＿light.