Scientists generally agree that earth’s climate will warm up over the next 50 to100 years_____ it has warmed in the 20,000 years since Ice Age.
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.