Kiến thức: đọc hiểu
Giải thích:
by themselves = on their own = alone: tự làm, một mình
lonely (adj): cô đơn
Đáp án: D
So many _____ people applied for the position that we won’t be able to make a decision for weeks.
It isn’t very _____ to leave the lights on when you are not in the room.
My ideal world would be a peaceful one which there are no wars or conflicts.
When they came home, they didn’t buy nothing from the supermarket.