1. Decline / decrease

to decline - [v] (formal)

1) to become gradually less or worse (we use this especially about standards of work or performance);

The number of people buying their own homes has declined

Britain's economic performance declined noticeably during the 1970s.

2) to refuse to accept smth. or do smth.

He declined their invitation.

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to decrease (+to) [dɪ'kriːs] - [v]

to become less in quantity, size or intensity; to make smth. smaller, fewer - used especially in writing about business or technical subjects.

If a company improves its efficiency, its costs will decrease.

The speed of rotation gradually decreases to zero.

decline / decrease

1. Her influence __________ after she lost the election.

2. The number of staff has __________ from 217,000 to 114,000.

3. The band __________ to comment on the story.

4. Interest in sport is steadily __________.

5. He offered the boys some coffee. They __________ politely.

6. The government have __________ the size of grants.

2. Vary / differ

to vary ['vɛərɪ] - [v] (in smth.)-

to be different in size, volume, strength, etc.; (from smth. to smth.) to change, especially according to some factor; to regularly change what you do or the way that you do it.

These fish vary in weight from 3 lb to 5 lb.

Opinions vary widely on this point.

My doctor said I should vary my diet more. to differ- [v]

to be different from smtb. in quality, features etc.; to differ from; to differ widely / greatly; to differ ill cost / size / appearance etc.; if two people or groups differ about smth., they have opposite opinions (about / on / over)

Humans differ from other mammals in their ability to speak.

Opinions on the subject differ widely.

The two layers differed about how to present the case.

The two drugs have the same effect, but they differ ill certain important respects.

vary / differ

1.Ticket prices to New York __________, depending on the time of year.

2.Scottish law has always __________from English law.

3.My parents __________widely in their tastes.

4.Methods of treatment __________according to the age and general health of the patient.

5. The cheeses __________in flavour from mild to strong.

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6. in this respect French and English __________.

3. Cure / treat / heal

to cure- [v]

(smb. of smth.) to make someone who is ill well again; to make an illness disappear completely, usually by medical treatment; Synonym: to heal

The doctors cured her of cancer.

This illness cannot be cured easily.

to treat- [v]

(smb. / smth.; smb. for smth.) to give medical care or attention to a person or a condition

She was treated for sunstroke.

Doctors treated her with aspirin.

to heal- [v]

to become or make smth, healthy again; (smb. of smth.) to restore smb. to health; to cure smb. of a disease; Synonym: to cure

The wound healed slowly.

The holy man healed them of their sickness.

cure / treat / heal

1. Now doctors believe they have __________him of the disease.

2. Her cancer can only be controlled, not __________.

3. Last year the hospital __________ 40 cases of malaria.

4. The boy was __________ for a minor head wound.

5. Therapies like acupuncture do work and many people have been __________ by them.

6. An experienced nurse __________ all minor injuries.