We have advised you on how to cut down your energy use. We remember that.

2/20

We can no longer remember having advised you on how to decrease your energy use.

We remember having advised you on how to maintain your energy use.

We remember having advised you on how to decrease your energy use.

We remember to have advised you on how to decrease your energy use.

Giải thích

Đáp án đúng là: C

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