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1. Linh often uses her headphones when she listens to music ……….. her parents don’t like loud noise.
A. so B. but C. because D. and
2. Ngoc loves ………….. outdoors with trees and flowers.
A. being B. be C. to being D. -
3. My sister …………… blood twenty times so far.
A. to donate B. has donated C. is donating D. donates
4. Let’s help the street children because they have bad …………. .
A. live B. earning C. living condition D. ways of life
5. The Japanese eat a lot of fish and healthy food, ……….they live for a long time.
A. so B. because C. or D. but
6. Lan ……….. English for more than a year but she can speak it very well.
A. learns B. learn C. learned D. has learnedv
a, Có góc C1= góc D1=50 độ
mà 2 góc này ở vị trí đồng vị của a và b
=> a//b
b, Có a vuông góc với c(gt)
mà a//b(cmt)
=>c vuông góc với b
