____ HIS HOMEWORK, HE STARTED TO SURF THE SOCIAL NETWORKS. A. AFTER...

Câu 15: ____ his homework, he started to surf the social networks.

A. After he had finished B. After he has finished

C. By the time he finishes D. At the time he finished

Blacken the letter A, B, C or D on your answer sheet to indicate the sentence that best completes each

of the following exchanges from 16 to 17