If you write something and send it immediately by email, which you _______ later regret, there is no chance for second thoughts.[ ]

__________are these trousers ——They’re ￥200.

It’ time _______ a picnic. We can’t help _______.

You didn’t go to the party last night,didyou— I do wish I ___there.

_____is known to us all is that we shoulddo as much as we can ______ stop the pollution of the environment