Please do me a favor —_____ my friend Mr. Smith to Youth Theater at 7:30 tonight.
__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.
I like this jacket better than that one, but it costs almost three times______.
Only when I left my parents for Italy __________how much I loved them.
I felt so bad all day yesterday that I decided this morning I couldn’t face ________ day like that.
Years ago we didn’t know this, but recent science _______ that people who don’t sleep well soon get ill.