Question

supply the correct form.

1. as soon as mr john arrived at the airport, he realized that he (leave) _________ his passport at home.

2. it's high time something (do) __________ to prevent traffic jams in big cities.

3. were you in my position, what you (do) ________?

_{P/s: làm gt hộ e ạ}

Answer 1

1. as soon as mr john arrived at the airport, he realized that he (leave) ____had left_____ his passport at home.

Dựa theo ngữ cảnh của câu, thấy việc anh ấy quên hộ chiếu ở nhà xả ra trước khi anh ấy đến sân bay => thì quá khứ hoàn thành

2. it's high time something (do) ____was done______ to prevent traffic jams in big cities.

it's high time S + thì quá khứ đơn 

3. were you in my position, what you (do) ___would you do_____?

Câu điều kiện loại 2 

Cấu trúc S V quá khứ đơn, S + would V0