HARDLY HAD WE SETTLED DOWN IN OUR SEATS...THE LIGHTS WENT OUT.A. T...

28. - TRAC NGHIEM VE LIEN TU TIENG ANH
TRAC NGHIEM VE LIEN TU TIENG ANH

28. Hardly had we settled down in our seats...the lights went out.

a. than

b. after

c. before

d. when