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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
One problem with all languages__________they are full of irregularities.
A. when
B. so
C. is that
D. in case
One problem with all languages__________they are full of irregularities.
A. when
B. so
C. is that
D. in case
Câu này thiếu động từ chính nên phương án C là sự lựa chọn tốt nhất.
Đáp án C.