Thả một vật có khối lượng 200g từ độ cao 4m so với mặt đất
a.Tính cơ năng của vật 
b.Tính tốc độ đạt được khi chạm đất

Hoà tan m (g) kim loại Ag cần dùng 600 ml dung dịch HCl 1M.
a.Tính thể tích thu được ở điều kiện chuẩn
b.Tính m
c.Tính CM của dung dịch AlCl3 sau phản ứng

You are a student at a language school in New Zealand studying Business English.Part of the course is a summer work placement programme.Unfortunately, you have just learnt from the school that this programme has now been cancelled.
Write a letter to the School Principal and in your letter:
  -state your reason for writing

– describe the problem and your concerns

 -explain what you would like the Principal to do
Write an email at least 150 words

All of the students_______ the seniors will receive their grades in two weeks.
a. but      b.so     c.and      d.or
Kèm giải thích cho e vs ạ. E cảm ơn
 

Email writting 
Your class is organizing a program for children at your school on the occasion off International Chidren's Festival. Write an email 120-150 words to your head teacher.In this email, you should mention
    - activities you plan
    - arrangements you have already made
    - needed budget and support

1.In order to evalute different approaches to teaching English, a number of experiments have been__________
a.put a side       b.called off       c.carried out      d. taken on
2.Susan is still in Paris, so you______ seen her at the gym yesterday
a.hadn't             b.should have  c.can't have       d.musn't have