We know it is hard to make such a decision _______ he has just built up the team and the project is going through the important stage now.[ ]

Modern China is experiencing a completely new periodrespect for science and creativity has become the guiding principle of society．

I was so familiar with her that I recognized her voice ________ I pickedup the phone

Mr Zhang gave the textbooks to all the people _____ those who had already taken them[ ]

How is the man injured in the earthquake—The doctor said if ________ in a proper way，he was likely to be saved