_______ is believed, all the scientists subscribe to the view ______ the increase in the earth’s temperature is due to the burning of fossil fuels to produce energy.

I didn’t have _____ to say, so I said _____. 

All the football fans shouted and cheered so much that you could hardly hear _____ else．

It rained heavily this morning, but _______ of my classmates were away from school.

It was hard for him to fit in a new class, in which ______ he was familiar with.