YOU HAVE TO BE AWARE OF THE DAMAGE HUMANS ARE DOING TO A. HAD T...

câu 17. - 2020 CAU HOI TRAC NGHIEM TA
2020 CAU HOI TRAC NGHIEM TA

Câu 17.

You have to be aware of the damage humans are doing to

A. had tried B. was trying C. tried D. had been trying