Giúp mình với,mình cần gấp!!!!!!! Tìm và sửa lỗi sai: 1. A lot of people are still unaware about environmental pollution around us. 2. Lang said that he knows how the procedures for doing the experiment, but when he began to work in the laboratory, he found that he was mistaken. 3. When I came to the store to purchase the printer advertise on television, we found that all the printers had been sold. 4. My company is not only raising his prices but also decreasing the production of his product as well

1. A lot of people are still unaware about environmental pollution around us.

⇒of

Be unaware of sth: không có nhận thức, hiểu biết về cgi

2. Lang said that he knows how the procedures for doing the experiment, but when he began to work in the laboratory, he found that he was mistaken.

⇒knew

Trong lời nói gián tiếp thì động từ cần đc lùi 1 thì so với lời nói trực tiếp

3. When I came to the store to purchase the printer advertise on television, we found that all the printers had been sold.

⇒ advertised

Cấu trúc dạng rút gọn của mệnh đề quan hệ: Nếu như đc viết hoàn chỉnh thì câu trên sẽ là

"When I came to the store to purchase the printer which was advertised on television, we found that all the printers had been sold." (khi tối đến cửa hàng để mua chiếc máy in đc quảng cáo trên TV thì chúng tôi nhận ra rằng tất cả máy in đã đc bán hết)

4. My company is not only raising his prices but also decreasing the production of his product as well

⇒ ∅

Trong cấu trúc "not only... but also" (không những.... mà còn) thì "but also" đã có nghĩa là mà còn, không những thế rồi nên không cần dùng as well nữa do as well có nghĩa tương đương với but also