Question

Tìm lỗi sai: 1)I thought I recognized the assistant which served us. 2) The twentieth century was the time when there was a lot of important events. 3) Tom has got the job. You must congratulate him for his success. 4) The cooker who is in the kitchen doesn't work anymore.

Answer 1

I thought I recognized the assistant which served us. => who

2) The twentieth century was the time when there was a lot of important events.  => were

3) Tom has got the job. You must congratulate him for his success. => on

4) The cooker who is in the kitchen doesn't work anymore.=> cook