1 A: Linda ...is learning... (learn) to drive at the moment.
B: I know. She told me last week.
2 A: Has Alan got a job?
B: Oh yes. He … (be) the manager of a leisure centre.
3 A: Do you want to have a break now?
B: Not yet. I … (write) a report for tomorrow's meeting.
4 A: It's ten o'clock. Have you given the manager his letters?
B: Yes, and I … (also/type) six reports so far this morning.
5 A: Is Jeff still in the garden?
B: Yes. He … (plant) flowers all afternoon.
6 A: That author is very well-known, isn't she?
B: Yes. She … (write) twenty novels so far.
7 A: You look very happy today.
B: I am. I … (just/hear) some good news.
8 A: What time … (the play/start) tonight?
B: Seven o'clock, I think.
9 A: Are you new to this company?
B: Not really. In fact, I … (work) here for almost two years.
10 A: Are you ready for the concert?
B: Yes. I … (practise) for weeks.
11 A: Do you do any exercise at all?
B: Yes. Actually, I … (go) swimming three times a week.НУЖНЫ ЛЮДИ ЧТОБЫ СНИМАТЬСЯ РАССКАЖУ НА СЕРВАКЕНУЖНЫ ЛЮДИ ЧТОБЫ СНИМАТЬСЯ В СЕРИАЛ НРВЫЙ ГОДНУЖНЫ ЛЮДИ ЧТОБЫ СНИМАТЬСЯ В СЕРИАЛ НРВЫЙ ГОД
. ∠ALB и ∠ALC — смежные, тогда:
∠ALB + ∠ALC = 180°.
Таким образом:
∠ALB + 121° = 180°;
∠ALB = 180° - 121°;
∠ALB = 59°.
2. Рассмотрим △ABL:
∠LAB + ∠ABL (он же ∠ABC) + ∠ALB = 180° (по теореме о сумме улов треугольника).
Таким образом:
∠LAB + 101° + 59° = 180°;
∠LAB = 180° - 160°;
∠LAB = 20°.
3. Так как AL — биссектриса, то:
∠LAB = ∠LAC.
Таким образом:
∠LAC = 20°.
4. Рассмотрим △ALC:
∠LAC + ∠ALC + ∠ACL = 180° (по теореме о сумме улов треугольника)/
Таким образом:
20° + 121° + ∠ACL = 180°;
∠ACL = 180° - 141°;
∠ACL = 39°.
∠ACL = ∠ACB = 39°.
ответ: ∠ACB = 39°.
