Đề thi chính thức Tiếng Anh vào 10 năm 2020-2021 (Đề 22)

We haven't used these machines for a long time

34/36

We haven't used these machines for a long time

=> It's been

0/3000 ký tự
Giải thích

=> It's been a long time since we last used these machines./ a long time since the last time we used these machines. /a long time since these machines were last used.