Ôn đúng trọng tâm – Học chắc từ hôm nay
______(19)
Giải chi tiết:
I love going to the mountains _______ the winter.
Sheila works _________ an accountant in a large company.
It was ___________ good music that I couldn’t stop dancing.
A lawnmower is a machine __________ is used for cutting grass.
