WHEN HE ARRIVED, A CROWD ________ FOR SEVERAL HOURS TO THE EXPERTS WERE NOT FULLY _______ THAT THE ANIMAL WAS BECOMING EXTINCT

Câu 241.

When he arrived, a crowd ________ for several hours to

The experts were not fully _______ that the animal was

becoming extinct.

greet him.

A. convinced B. believed

C. realized

D. discovered

A. had been waiting

B. is waiting

C. has been waiting

D. was waiting