hòa tan hoàn toàn 14g CuO, MgO vào 500ml dung dịch HCl 1M được dung dịch A. Khối lượng muối trong dung dịch A là bao nhiêu gam?

Ex 1: complete the passage with the given words.

Early in the morning of August 29, 2005, Hurricane Katrina, the most destructive natural (1) _________ in the history of New Orleans, struck the city. The storm brought strong winds and heavy rains for several days. As a result, (2) _____________ from the river and lakes rose, breaking the levees and poured directly into the city. Soon 80 percent of the city was (3) ________ the water. People scrambled to rooftops for safety, desperate for food and drinking water. The (4) ___________ were so strong that even beds in Hyatt Hotel were seen flying out of the hotel windows. The loss was tremendous. Most of the major roads and bridges were (5) _______, and house collapsed. Nearly 2,000 people were killed. After the storm, several natural grounds for the breeding and migrating of different species of animals and birds were (6) __________ lost.

1. A. disaster B. wonder C. landmark D. monument

2. A. fish B. mud C. water D. debris

3. A. in B. on C. under D. with

4. A. rains B. earthquakes C. floods D. winds

5. A. destroyed B. built C. repaired D. widened

6. A. slowly B. carefully C. permanently D. happily

Câu 1 : Cho m gam kim loại Na tác dụng với nước dư , thu được dung dịch chứa 6 gam NaOH . Giá trị của m là

Chuyển câu trực tiếp sang câu gián tiếp.

7. Helen said, "The tickets for the show are very expensive."

Hãy viết bài văn nghị luận ngắn (15- 20 dòng) về chủ đề môi trường. Chỉ rõ các câu văn sử dụng yếu tố biểu cảm.

17. She said "I like travelling by plane."

–> She said she ______________ travelling by plane.

Ex 3. Complete the second sentence so that it means the same as the first. Use the word in brackets. You may need to change the word.

5. My CV is attached in this email. (FIND)

–> ______________________________________________________________