Ex. 3. a) Study the following: 1. We always use a/an with these illnesses: a cold, a head a sore throat 2. We can use or omit a/an with these: catch (a) cold, have (a/an) backache/earache/stomach-ache/toothache. 3. We use no article at all with these plurals: measles, mumps, shingles 4. We use no article with these: (high) blood pressure, flu, gout, hepatitis b) Supply "a/an" where necessary. Note where you can use “a/an" zero (-). 1. I'm going to bed. I've got a headache. 2. I was awake all night with ........ toothache. 3. I think Gillian's got ........ flu. 4. The children are in bed with ........ mumps. 5. Mind you don't catch ........ cold. 6. ........ measles can be very unpleasant. 7. Don't come near me. I've got ........ sore throat. 8. I think I've got ........ cold. 9. I've had ........ terrible backache. 10. I often suffer from ........ backache.