Viết tiếp chữ thích hợp vào chỗ trống

1) ........................your homework yet?
a) Are you doing
b) Have you done
c)Do you do
2)yes,i ........... it already
a) am doing
b)have done
c) do
3) Dickens ...................... a lot of  novels
a) has written
b)writes
c)wrote
4) Her mother ........................ three books.She is going to start the fourth one soon
a)Has written
b)Writes
c) wrote
5) I think i ............ him before
a) meet
b) met
c) have met
6) oh,yes! Now i remember. I .......................... him when i was in Hoi An.He was our guide
a) meet
b) met
c) have met