Tìm lỗi sai:

1. When I arrived at the station, the train has already left.

2. Up to now, there had been no womwn being chosen the US president

Chuyen sang cau bi dong:

Have they delivered the package yet?

Tìm lỗi sai:

What did you do at 9 o'clock last night? I phoned you but nobody answered