Cho góc xOy, Ot là tia phân giác, M thuộc Ot, kẻ MA vuông góc với Ox tại A, MB vuông góc với Oy tại B . AB cắt OM tại H . Chứng minh :
a) H là trung điểm của AB và OM vuông góc với AB
b) Vẽ BC vuông góc với OA tại C. BC cắt OM tại N. Trên tia OB lấy điểm D sao cho OD = OC. Chứng minh 3 điểm A,D,N thẳng hàng
15. They cancelled the flight because it was foggy.
Because of ________________________________________________________
16. Because the traffic is heavy, I sometimes come to my office late
Because of ________________________________________________________
17. I’m sorry I missed your birthday party.
I wish __________________________________________________________
18. Because of the absence of atmosphere on the moon, the sky is black just as in space.
Because_______________________________________________________________
19. My father used to go fishing in the pond near the woods. (Make questions for the
underlined words)
_____________________________________________________________________
20. How far is it from Hanoi to Ha Long Bay?
What .__________________________________________________________
21. There are more vehicles on the streets now. (Rewrite, using "used to")
There did not ___________________________________________
22. Road users should obey traffic rules strictly.
Traffic rules___________________________________________________________
23. The distance from my house to school is about two kilometers. (rewrite the sentence, using
“ It’s” )
_____________________________________________________________________
24. Although that woman is old, she works hard, . (rewrite the sentence, using “ despite”)
__________________________________________________________________
25. My father went to work by public bus. Now he cycles. (rewrite the sentence, using “used
to”)
__________________________________________________________________