Hàm số y = x 3 − 3 x  đạt cực tiểu tại x=?

A. -2  

B. -1 

C. 1 

D.  0

Choose the word whose underlined part has a different pronunciation from the others in each group

A. chat

B. drama

C. fact

D. back

Do you know two straight lines which _______ at a point _______ an angel?

A. met-formed

B. have met-have formed

C. meet-have formed

D. meet-form

Sắp xếp các câu sau

1. Where/ Dan/ from/is?

___________________________________________________________.