We arrived at the airport. We realized our passports were still at home

* Hướng dẫn giải

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We arrived at the airport. We realized our passports were still at home.

    Quá khứ đơn           Quá khứ đơn            Quá khứ đơn

1. It was until we arrived at the airport that we realize our passports were still at home.

                                                                                       Hiện tại đơn => sai thì => Đáp án sai

2. We arrived at the airport and  realized our passports are still at home.

                                                                                       Hiện tại đơn => sai thì => Đáp án sai

3. Not until  had we arrived at the airport we realized our passports were still at home.

                         Quá khứ hoàn thành=> sai thì => Đáp án sai

4. Not until  we arrived at the airport , did we realize our passports were still at home.

Cấu trúc: It was not until + clause that + S + V (quá khứ đơn)+.....

               = Not until + clause , did S + V (nguyên thể)...............

(Mãi cho đến khi..)

• Đáp án D