Grammar in Focus

Put the word in brackets into the correct form, choose the correct word in bold or fill in the gaps where necessary.

In the past, people 1) .......... ........... .....(not/ understand) how important a good diet was, but these days we 2) ........... (know) that good food helps us 3) to stay/staying healthy. Experts say we should 4) to have/have five potions of fruit 5) .............. vegetables a day. If you don't like 6) eating/eat fruit, make a smoothie with bananas, apples and 7) a/some orange juice. And remember, 8) jars/boxes of cereal are often high 9) with/in sugar and salt, so you 10) ought to/may check the label before you buy them.​