Most of the developing countries are faced with lots of troubles , _____the financial problem is not the worst .
The flowers his friend gave him will die unless______ every day.
The boy wanted to ride his bicycle in the street, but his mother told him _____.
It’s cold in here. We must have the fire day and night.
---Can I tell my best friend about it? ---No. I don’t want anyone else to know. You _________ let it out.
--- Who’s the man giving the speech? --- Well, if you ____ know, his name is Lyric.