(Viên chức Mầm non) 5000+ câu trắc nghiệm Ngoại ngữ có đáp án - Unit 3
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No one has informed us why our application __________unsuccessful.

63/102

No one has informed us why our application __________unsuccessful.

would be

was

has been

had been

Giải thích

Đáp án đúng là c.