BA IS TIRED ……… HE STAYED UP LATE WATCHING TV .A. BECAUSE B. AS C....

13. - DE KT HK II 2009-2010(2)
DE KT HK II 2009-2010(2)

13.

Ba is tired ……… he stayed up late watching TV .

A. because

B. as

C. since

D. A,B, and C are correct