THEY CANCELLED THEIR PICNIC __________ THE WEATHER WAS BAD.A. BECAU...

9. - 500 CAU TRAC NGHIEM THI VAO LOP 6 MON TIENG ANH
500 CAU TRAC NGHIEM THI VAO LOP 6 MON TIENG ANH

9. They cancelled their picnic __________ the weather was bad.

A. because B. when C. but D. or