--- Look! It ____ be Jack on the playground.---It ____ be him. Because I saw him enter the school library just now.A. may; mustn’t B. must; can’t C. can; can’t
—I often listen to the song Rainbow. —So do I.It________beautiful.
This is a photo________my family.
—Let’s go to the zoo. —That sounds very________.
The girl________red clothes today.She looks very beautiful.
Listen!The birds________in the tree.