用所给词的适当形式填空。

1. Mr. Green has got three _____ (grandchild) and he loves them.

2. Today,  we are going to learn the _____ (two) lesson.

3. Please _____ (send) me an email when you find the book.

4. Let's _____ (download) this free (免费的) game at once.

5. My mother is an English teacher. She often gets _____ (information) for her lessons from the Internet.