câu 15 và 17 và 20 là gì thế ạ giúp em với gấp ạ

Choose the word which best fits each gap.

Breakfast is the (1) ________ important meal of the day. It provides the nutrients your body needs for (2) ________ and helps to maintain your blood sugar level. Studies have shown that people who don't have breakfast have a low blood sugar level and are often slow, tired, hungry and (3) ________ to concentrate. Surprisingly, breakfast actually plays a part in weight control. It's easier to (4) ________ weight if you eat in the morning rather than later in the day. Dividing the day's calories (5) ________ three meals helps take off weight more efficiently than (6) ________ breakfast and having two larger meals a day does.

1.     a.healthy       b.tasty        c.main         d.most
2.     a.strength      b.power     c.energy      d.effort
3.     a.able             b.enable    c.unable      d.capable
4.     a.lose             b.put          c.gain           d.drop
5.     a.in                 b.into          c.up              d.for
6.     a.skipping     b.making    c.buying      d.serving

Supply the correct form of the words in brackets.
1.Drinking unclean water can cause _________. (sick)
2.My uncle is a _________. He doesn't eat meat or fish. (vegetable)
3._________ can increase the risk of heart disease and diabetes. (obese)
4.I'm _________ to shellfish, so I can't eat lobster and shrimp. (allergy)
5.I got _________ during my beach vacation. (sunburn)
6.Lack of vitamin E can cause skin diseases and _________. (tired)
7.The symptoms of the sisease include fever and _________. (head)

V.    Fill in the blank with a suitable word . 

Organic food is very popular these days. It can also be very (1)expensive . Some organic food costs twice as much as non-organic food. Parents of young children, and even some pet owners, will pay high prices for organic food if they think it's healthier. But many others think organic food is just a (2)  waste  of money.

There is one main (3)_________ between organic and non-organic food. Organic farms do not use agricultural chemicals such as pesticides that stop insects from damaging crops. In many (4)________ foods that claim to be organic must have special labels that guarantee they're grown organically.

Some people think organic also means "locally grown", and originally this was true. But over time organic farming has become big business, with many organic foods now being grown by large agricultural companies that sell their (5) ____________ far from where they're grown. Processed food made with organic ingredients has also become more popular. At first, only small companies produced these products. But as demand overtook supply, big food companies that had been selling non-organic products for many years also began selling organic products. Small organic food companies found it difficult to compete with these (6)________ companies, and many didn't stay in business much longer.