Rewrite each of the sentences so that the meaning stays the same:

Từ 5-10 thui

Rewrite each of the sentences so that the meaning stays the same:

Em hãy cho biết trong phòng thí nghiệm, để thu khí hiđro vào lọ bằng cách đất không khí, ta phải đặt lọ thu khí như thế nào? Giải thích vì sao?

Rewrite the following sentences:

66.It’s a contest in which the participants have to speak English.

A.It’s a English – speaking contest.

B.It’s a speaking - English contest.

C.It’s an English – speaking contest.

D.It’s an English – contest speaking. 67.Please don’t make noise in class. A.Would you mind not make noise in class?

B.Would you mind not making noise in class? 

C.Would you mind don’t make noise in class?

D.Would you mind not makes noise in class?

68.In the middle of my meal, the phone rang..

A.While I am having dinner, the phone rang

B.While the phone rang, I was having dinner.

C.While I was having dinner, the phone rang.

D.While I was have dinner, the phone rang.

69.“I must go today ,” my father said. A.My father said that he had to go that day.

B.My father said that he went that day.

C.My father said that he had to go today.

D.My father said that he had to went that day.