Choose the correct option to fill in the blanks.

They ___________ whirling around for 10 minutes and are still going.
Ahave
Bwere
Chave been
Dhad been
Choose the correct option to fill in the blanks.

They ___________ whirling around for 10 minutes and are still going.
Ahave
Bwere
Chave been
Dhad been