The environment is terrible.
I think it will be even worse the government takes actions to protect it. ( )
A.untilB.whenC.ifD.unless
Sue told me that she ____________ shopping with her sister the next day.
By the end of last week, she______in the west of China for two months helping the homeless children.
Ken was so busy when we saw him, because he _______ a speech the next day.
--- What did he tell you just now?--- He said that ____________ tomorrow morning.
By the time Dave reached the small boat, a thick white fog _______ over the surface of the water.