YDS PARAGRAF DOLDURMA / TEST 2 17. Soru

17.

Suddenly the man heard the low hum of an
engine. At first he thought that it must be a car
travelling along the road he had recently left.
……… . Instead, it grew louder and louder and
seemed to be coming from above. He looked up
quickly and saw an aeroplane cutting a crazy,
zig-zag path across the sky.