- Vì:

1.Cây xanh quang hợp sử dụng khí cabonic và thải ra khí oxi vào không khí giúp con người hô hấp

2. Lá cây xanh có tác dụng cản bụi, diệt vi khuẩn và giảm ô nhiễm môi trường

I. Rewrite these sentences.

1. Lien doesn't like fish as much as beef.

=> Lien ..................................................................................

2. He couldn't go to school because of his illness.

=> Because he ........................................................................

II.Fill in blank with correct preposition.

1. All the students _____ class 7A visited the zoo last week.

2. Nam is better _______ speaking English than writing.

3.David's uncle parid ____ his education ____ university.

4. Volunteers are keen ____ helping the elderly people in th neighbourhood.

5. The idea ______ going out in the dark really scares me.

6. I prefer to socialize ______ my friends in my free time.

III. Rearrange the following words and phrases to make complete sentence.

1. in/USA/8.30/day/at/o'clock/start/3.30 or 4/morning/at/the/classes/each/ends/the/school/and.

=> ..............................................................................................................................................

2. take/courses/help/you/with/can/the/of/university/a/home/video cassette recorder/at.

=> ....................................................................................................................................

3. better/food/fat/eat/to/it/containing/and/is/less/sugar.

=> ......................................................................................................................

4. does/mail/how/local/in/much/cost/it/a/letter/to/VietNam?

=> .............................................................................................................................

5. will/left/see/turn/your/the/and/you/shop/souvernir/right/on.

=> ...........................................................................................................................................

Giúp tớ gấp nha :)) Cảm ơn các cậu :)) <3

P/S: Tớ không biết chọn chủ đề nhưng các cậu cứ giúp tớ phần bên trên nha!