THEY WOULD BE VERY SAD IF YOU...THEM A. DIDN’T VISIT B. NOT...

16. - 30 BAI TRAC NGHIEM VOI KEYS FOR 9 P
30 BAI TRAC NGHIEM VOI KEYS FOR 9 P

16. They would be very sad if you...them

A. didn’t visit B. not visited C. wasn’t visit D. visited