Minh last visited his hometown 5 years ago

Minh last visited his hometown 5 years ago.
A. Minh hasn’t visited his hometown was 5 years ago.
B. Minh hasn’t visited his hometown 5 years ago.
C. Minh has never visited his hometown for 5 years.
D. Minh hasn’t visited his hometown for 5 years.

If you don’t give me a hand, I can’t finish this task.
A. Unless you give me a hand, I can finish this task.
B. Unless you give me a hand, I can’t finish this task.
C. Unless you don’t give me a hand, I can finish this task.
D. I can finish this task unless you don’t give me a hand.

A. damaged            B. affected            C. prevented                     D. polluted