Question

Indeed there had been a distant for some time, although I had paid no attention to it. Now I started listening and I thought it sounded like the characteristic noise of jet airplanes constantly landing and taking off. Therefore rumbling means ____________________________.

Answer 1

Answer:

make a continuous deep sound

Explanation:

it may sound like a distant thunder

Answer 2

Rumbling means the thundering sound from the distance.

Explanation:

I did not pay any attention since I heard it from long distance. After listening to it sounded like the “characteristic noise of jet aeroplanes” accompanied by the sound of constant landing and take-off.

Since the sound is compared to the sound of the jet planes, the rumbling sound should be deep, continuous and thundering sound which created lot of noise pollution.