_______ a book in the library, enter a key word into the computer.

I’ll return the book to Mary, but I can’t find her anywhere.—She ______ the teacher’s office. You can find her there.

We will go for a picnic if it ______ tomorrow.

Li Lei can’t go hiking with us today,because he take care of his sick mother.

Shall we go and ________ hello to the foreign teachers?–Good idea! Let’s go.