These natural disasters have warned us that everyone should start to protect the _____ immediately.
"Please __________why you're so late," said his girlfriend.
I'm sorry. I _____________ you__________ to me.
The British are not so familiar with different cultures and other ways of doing things, ___________ is often the case in other countries
I would have come to see you earlier, but I__________too busy.
With summer coming on, the weather gets hot _________.