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In the past, the process of choosing a career was a much...

Câu hỏi: 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 26 to 30.
In the past, the process of choosing a career was a much simpler matter than it is today. Aboy often followed in his father's footsteps. His sister learned the household skills that would prepare her to become (26)______ wife and mother. Nowadays young people grow up in a much freer society (27)______they enjoy almost unlimited career opportunities. In recent years, there (28)______an enormous increase in the kinds of vocations from which it is possible to choose. In addition, many of the barriers to career opportunity that existed only a few decades ago, such as (29)______based on sex or religion or ethnic origins, are (30) disappearing.
The word or phrase which best fits the gap (28) is...
A. had been
B. has been
C. will be
D. was
In recent years: trong những năm gần đây => động từ chia ở thì hiện tại hoàn thành
"In recent years, there has been an enormous increase in the kinds of vocations from which it is possible to choose" (Trong những năm gần đây, đã có sự tăng mạnh về các loại nghề nghiệp để cho mọi người lựa chọn.)
Đáp án B.