It is difficult to write rules that tell exactly when we should apologize , and it is not difficult to learn how to do it
(A) Difficult
(B) That
(C) When
(D) And
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Tiếng Anh lớp 12
It is difficult to write rules that tell exactly when we should apologize , and it is not difficult to learn how to do it
(A) Difficult
(B) That
(C) When
(D) And
