... HE IS TIRED, HE CAN'T WORK LONGER.A. BECAUSEB. EVEN THOUGHC. A...

16. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

16. ... he is tired, he can't work longer.

a. Because

b. Even though

c. Although

d. Besides

 a