Из точки А, лежащей вне окружности с центром в точке О, к этой окружности проведены две касательные. Докажите, что отрезок, соединяющий точки касания, перпендикулярен отрезку АО.

Помогите плиз) тут выбрать надо

1.Where is ... bus station.

A. a

B.the

C.-

D. an

2.I ... ... now.

A. am working

B.has worked

C.work

D.is working

3.Tom ... by car

A. always goes to work

B.goes always to work

C. goes to work by always

D. goes to work always

4. Let's go to ... shop.

A.a

B.the

C.- D.an

5.He phoned to say he ... his bag on the plane.

A.would forget

B.has left

C.had left

D.has forgotten

6.She is watching TV ... .

A.right now

B.for two days

C.every day

7.She usually ... TV in the evening.

A.is watching

B.watches

C.watched

8.George ... for an hour before the bus came.

A.waits

B.was waiting

C.had waited

D.waited

9.I should like to know how glass ... .

A.manufactures

B.manufactured

C.has manufactured

D.is manufactured

10.If the weather is fine I ... to the park.

A.go

B.shall go

C.should go

D.had gone

11.What ... you doing now?

A.are

B.have been

C.had

D.am

12. ... be ... this letter yesterday?

A.does write

B.did write

C.had written

13. ... you ever ... to Moscow?

A.have been

B.were

C.has been

D.to be

14.What do you do after ... breakfast?

A.-

B.a

C.the

D.an

15.Look! That man ... to open the door of your car!

A.tries

B.tried

C.was trying

D.is trying

16.For ... breakfast I have coffee with milk and sugar.

A.the

B.-

C.a

D.an

А стае акелы было 110 волков и волчиц причем волков было на 36 больше чем волчиц.сколько волков было в стае акелы?сколько волчиц?

с чем реагирует сера как окислитель? с алюминием или хлором?

помогите составить предложения со словосочетаниями: жиырма бес, күн ұзаққа, ойнап жүр, он екінші, спорт алаңы, футбол кұрамасы