Thanks for taking care of the garden, it’s becoming _______.—You’re welcome.

These problems, __________, will seriously affect the growth of teenagers and even the nation’s future.

We shall never forget the days ________ we spent playing happily together.

I’m frustrated after so many failures. I can’t see any hope.—Behind every misfortune ________!

Someone is knocking at the door. Who may it be—It ______ be Tom. He is still in the school.