Bảng đâu mà làm anh bạn

Hoà tan 14,2 gam hỗn hợp X gồm MgCO₃ và một muối cacbonat của kim loại M vào một lượng vừa đủ axit HCl 7,3%, thu được dung dịch Y và 3,36 lít khí CO₂ (đktc). Nồng độ MgCl₂ trong Y là 6,028%. Cho dung dịch NaOH dư vào dung dịch Y, lọc lấy kết tủa đem nung ngoài không khí đến khối lượng không đổi thì thu được m gam chấy rắn. Giá trị của m là

A. 7,6

B. 10,4

C. 8,0

D. 12,0

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.

Researchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business ___(5)___, involves the utilization of a  decision worksheet. Psychologists  ____(6)____  optimization compare the actual decisions made by people to theoretical ideal decisions to see how similar they are. Proponents of the worksheet procedure believe that it will yield optimal, that is, the best decisions ___(7)___ there are several variations on the exact format that worksheets can take, they are all similar in their essential aspects.

Worksheets require defining the problem ___(8)____ a clear and concise way and then listing all possible solutions to the problem. Next, the pertinent considerations that will be affected by each decision are listed, and the relative importance of each consideration or  consequence ___(9)__ Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding these values together. The alternative with the highest number of points emerges as the best decision.

Điền vào số (9)

A. determined       

B. are determined   

C. is determined    

D. be determined

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction.
 It is the writing English that causes difficulties to foreigners.

A.the writing

B.that

C.difficulties

D.foreigners