Viết số thích hợp vào chỗ chấm:

430 kg = ... yến

2500kg = ... tạ

16 000kg = ... tấn

Mark the letter A, B, C or D on your answer sheet to indicate the word of phrase that is OPPOSITE in meaning to the underlined part in each of the following question.

We ought to keep these proposals secret from the chairman for the time being.

A. revealed 

B. frequented        

C. accessible         

D. lively