改为同义句:The girls are singing on and on.The girls are singing ---- ---- -----.all the time还是one by one?给出语法根据,风唱梵音

问题描述:

改为同义句:The girls are singing on and on.
The girls are singing ---- ---- -----.
all the time还是one by one?
给出语法根据,
风唱梵音

one by one 一个接着一个
all the time 一直 和例句中on and on 不停地 一个意思
根据意思 只能填一直 all the time
这些女孩们一直在唱歌