I’d rather you ___ anything about it for the time being.

If human beings had been a bit less greedy and cruel, more birds and animals _____dying out.

You look very tired. You ____ late last night.

----Mary broke up with me!----You ______ have forgotten about the Valentine's Day．

So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ______.