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Cho ΔABC trọng tâm G. Đường thẳng qua G // BC cắt AB và AC tại M và N. Tính tỉ số S tứ giác MNCB/S ΔABC (S là diện tích)
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Giúp mình với We must pay the bill at once.  The bill ___________________________________________________________ – Many people in the world speak English.  English ___________________________________________________________ – This question is difficult to understand  It’s ___________________________________________________________ – I will repair your bicycle tomorrow afternoon.  Your bicycle ___________________________________________________________ – “Don’t throw things away,” Miss Linda said to the students.  Miss Linda asked ___________________________________________________________ – Penicillin can cure many dangerous diseases.  Many ___________________________________________________________ – Does your country export rice to Britain?  Is rice ___________________________________________________________ ? – Clement clarke moore wrote the poem in 1823.  The poem___________________________________________________________ – Chirstmas cards should be sent a week befor christmas day.  You___________________________________________________________ – “We are waiting for the school bus”, said the children.  The children said___________________________________________________________ – Nobody has used this machine for years  This machine___________________________________________________________ – They use recycled plastic to make toys  Recycled___________________________________________________________ – She said to me, “turn off all the lights when you go out  She said ___________________________________________________________ – The last time I played tennis was in 1990.  I haven’t___________________________________________________________ – “ We are waiting for the school bus” said the children.  The children said___________________________________________________________ – I asked Nam “Are you free tonight?”  I asked Nam___________________________________________________________ – I would like you to help me move this table.  Do you mind ___________________________________________________________? – Mai keeps leaving her pen at home.  Mai is ___________________________________________________________ – Air travel is faster than any other kinds of transport.  Air travel is the___________________________________________________________ – It is a contest in which participants have to cook rice.  It is a rice-___________________________________________________________ – Does your country export rice to Britain?  Is ___________________________________________________________?

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