Đề kiểm tra 15 phút Tiếng Anh 12 Thí điểm Học kì 2 (Đề 2)
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Before the invention of the printing press, books have been all printed

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Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction.

Before the invention of the printing press, books have been all printed by hand.

Before

the printing

have been

by hand

Giải thích

Đáp án C