Mark the letter A, B, C or D to indicate the correct answer to the following question.
We complained ____ the manager ____ the pressure working environment.
on - about
at - for
with - of
to – about
Kiến thời giới từ
Cấu trúc: S + complain to sb about sth: phàn nàn với ai về điều gì
=> We complained to the manager about the pressure working environment.
Tạm dịch: Chúng tôi đã phàn nàn với người quản lý về môi trường làm việc áp lực.
Đáp án : D
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