THEY HAVE WORKED IN THAT FACTORY SINCE 2001.-> THEY STARTED ...

3. - ĐỀ THI HS GIỎI ANH 9 09 10
Lớp 9 Tiếng Anh ĐỀ THI HS GIỎI ANH 9 09 10

3. They have worked in that factory since 2001.

-> They started ...