Phương trình nào sau đây vô nghiệm?

A. 3 x  +  4 x  =  5 x               B.  2 x  +  3 x  +  4 x  = 3

C.  2 x  +  3 x  =  5 x               D.  2 x  +  3 x  = 0

Choose the words that are not stressed in the following sentences. Practise reading the sentences aloud.

The train for Cambridge will depart from highway number 9.

A. train

B. for

C. highway

D. number 9