After a long walk, they were _______tired that they could not move even one step further.

The task is too much for him, so he can’t continue ______any longer. He must get some help.

The audience are _______young people who like pop music at the concert.

— Look! Black clouds are gathering.— Yes. A heavy rain is ______  to come.

—Hi, I hear you’re going to London this summer vacation. —            , I was going to, but now I have changed my plan.