The problem was too complicated for us to solve.

11/50

The problem wasn’t very complicated, so we solved it.

It was such a complicated problem that we solved it.

The problem was complicated enough for us to solve.

The problem was so complicated that we couldn’t solve it.

Giải thích

Đáp án đúng: D

Cấu trúc so…that: S + be + so + adj + that + S + V: quá…đến nỗi mà

Hướng dẫn dịch: Vấn đề quá phức tạp đến nỗi chúng tôi không thể giải quyết được.