We can do a lot to stay healthy. _______, we should eat a balanced (平衡的) diet. [ ]

I saw Helen at the party last month. It _________ a year since we met last time.

Look! Do you know ______man under the tree? –Sorry .It’s too far to see ______clearly.

Frank _____ to see his grandma if he _____ free tomorrow.

They have ________for about ten years.