More and more people found _________ necessary to have a balanced diet.

There are two new buildings near the sea, and ____of them are very tall.

Now, everybody, please turn to page _________and look at the ___picture.

Is that Lucy’s sister, Lily?—No, it _______ be her. She has gone to English.

As we all know, every minute, ____full use of____our lessons , will do good to our students．