We must protect wild birds and animals because they are .
—Lily, here are your pens. Please _____ . —OK, Mom.
— _____ do you _____ English? —I like it very much.
—How many _____ are there in your class? —About 63.
The sign means “ _____.”
—Kangkang, how many apples are there _____ the tree? —Too many.