Cho tam giác ABC vuông tại A ,góc C =30 độ kẻ phân giác BD cho CD=3 cm .Tính AC, AB ,BC.

Cho α là góc nhọn tùy ý.Tính :

S=2(sin⁶α+cos⁶α)-3(sin⁴α+cos⁴α)

*Rewrite:

1.I'm afraid he won't get over his illness soon.

➜I wish.............................................................

2.Her teacher taught her how to apply this theory.

➜She.................................................................

3.Someone will tell him that news.

➜He...........................................................

4.John used to visit his parents at weekends.

➜His parents..............................................

Her eyes are red .She (cry)?

*Give the correct form of the verbs:

1.We use to (write)toeach other every month when we (be) at secondary school. ........................................

2.Mai (know)a little English ,so she (wish)she (can)speak it fluenly. .....................................................

3.Maryam (stay) with us at the moment .She (be) my sister's friend. .............................................

4.John and I (be)penpals for nearly three years. ..........................................\

5.Kite and I (wait ) right here until you get back. .......................................