Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the 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 southpaw? 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
Điền ô số 33
A. collaborate
B. collaboration
C. collaborating
D. collaborated
Đáp án B
Giải thích: Ở đây ta cần một danh từ vì phía trước có tính từ và mạo từ “a”