Many species are in ______ danger of extinction now due to the foolish actions of ______ human race.

In order to pass the exam, You need to work much ________now.

一Did you see___________ at the party一No, I didn’t.

s population is expected toincrease to about 15 billion in 2040, _____ it will start to decline slowly

These comments are notdirectly ______ to the inquiry about safety standards.