Put the verbs in brackets into the correct form.
1) We... (already to give) our projects to the teacher.
2) Sandra ... (to do) the shopping before New Year's Eve.
3) You ... (not to phone) me by the end of the week.
4) I... (not to try) such a delicious cake before.
5) ... your sister ... (to reserve) the hotel room beforehand? -
Yes, she
6) ... Mr Smith ... (to discuss) that problem with his lawyer?
— No, he
7) Clara ... (never to be) to the Pyramids before.
8) ... you... (to take) part in this festival before? -- No, I
9) Mark ... (to finish) his work by 6 o'clock yesterday.
10) ... Nigel ... (to find) any information on the Internet by last
Tuesday? - Yes, he
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An Allergy is a hypersensitivity of the body to any substance. This substance can be any chemical ingredient, product, hair, dust, pollen or a germ. Today it is well established that allergens may be substances produced within the body. They are called antiallergenic or autoallergens. They are natural – unmodified tissue proteins that are isolated from the systems that are responsible for immunity. And purchased – proteins that acquire foreign properties against thermal, radiation, chemical, bacterial, viral, and other factors. For example, an allergic reaction develops with glomerulonephritis, rheumatism, arthritis, hypothyroidism.

В скобках – правильный вариант, то что подчеркнуто – убрать!
1. Was (Did) he play tennis last week?
2. Did you see Tom at an (the) end of the month?
3. Did he played (play) tennis yesterday?
4. Did she likes (like) to swim?
5. Did she be (Was she) in London last week
6. Do they celebrated (Did they celebrate) the holiday last year.
7. Did they can (Can they) swim well?
8. They couldn't come, didn't (could) they?
9. He was busy , didn't (wasn't ) he?
10. She got up at 7 o,сlock, did (didn't) she?