16. Mary answered all the questions _____ the last one, which she had never heard of before.
Many people believe we are heading for environmental disaster(灾难) _______we radically(根本地) change the way we live .
It’s a long trip and we’ll have to ___________ early tomorrow morning .
The way you thought of _________ the work is very good .
The doctor advised Tom strongly that he should take a holiday, but ________ didn’t help.
Our success _____whether everyone works hard or not.