People pay more attention to protecting environment. There _________ less pollution in the future.

—I wonder if you      for a picnic tomorrow.
—If it      ,I will go.

I will tell him to call you as soon as he         back.

I don’t know when he______ tomorrow .When he_____ , I’ll let you know.

The Dongying-Hainan airline         for about 5 months. I have taken the flights three times. 

—Hello! May I speak to Alice?
—Sorry, she _____ Shanghai.

The volunteers      a lot of help to the community for nearly ten years.

We____ shopping unless it ____ tomorrow.

---Excuse me. Where is Lily?
---Oh, she___ the volleyball match on the playground when I saw him just now.