The man _______ came to see you is my brother.
If we _______ adequate preparations, the conference wouldn’t have been so successful.
Without the development of the Internet, Taobao and Tmall______$ 5.7 billion in sales on 11 November, 2013.
He was very nervous in the contest.Otherwise,he _____________ the first prize.
I didn’t know that he was a cheat, or else I ________________ him.
________ the present unemployment continue, the society would face a moretroublesome situation.