Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that bestfits each ofthe numbered blanks from 31 to 35

Left-handers are the odd ones out. Sure, lefties (31) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (32) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (33) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (34) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (35) ______an end to leftie discrimination once and for all.

Question 34

A. which

B. who

C. what

D. that

Trong các kim loại Na; Ca; K; Al; Fe; Cu và Zn, số kim loại tan tốt vào dung dịch KOH là:

A. 3.

B. 4.

C. 5.

D. 6.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30 to 34.

        Bitcoins are a form of virtual currency. In other words, they are a type of money that does not exist in the actual world. However, they can be used to purchase actual products and services from real companies.

        The bitcoin system was created in 2009 by an enigmatic person named Satoshi Nakamoto. In fact, no one is sure if Satoshi Nakamoto is an actual person or a group of people. Bitcoins are designed to serve as an alternative to national currencies, such as dollars and euros, They can be used to pay for things instead of cash or credit cards. When bitcoins are transferred from a buyer to a seller, the transaction is recorded in a public database.

        Governments are concerned that bitcoins can easily be stolen by hackers. It has dawned on them that they might be used for illegal purposes. For example, stolen goods could be purchased without the government's knowledge. Although more and more companies are beginning to accept bitcoins, the percentage of purchases made using bitcoins is minuscule compared to other online payment methods, such as credit cards. Instead, many bitcoin owners simply keep them as an investment since more valuable in the future.

        This may or may not be a wise approach. Currently, the value of bitcoins is fluctuating wildly, especially when compared to highly stable national currencies, Bitcoin Investors are gambling on the hope that as this high-tech money becomes more widely accepted, its value will soar.

(Adapted from: https://www.digitalcommerce360.com/)

The word “they” in paragraph 1 refers to

A. dollars

B. euros

C. things 

D. bitcoins

Trong số các kim loại Al, Zn, Fe, Ag. Kim loại nào không tác dụng được với H₂SO₄ loãng ở nhiệt độ thường?

A. Ag.

B. Zn.

C. Al.

D. Fe.

Mark the letter A, B, C, or Don your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

A. half 

B. calm 

C. chalk 

D. culture 

Sai.