问题
the whole process for the studies of cancer took more than a year, the technology is moving so fast that it will soon take just weeks
A:How
B:Because
C:If
D:While
B:Because
C:If
D:While
正确答案是：
同类题型
Health officials have tried to raise_______ about the H1N1 flu among all people
Were you surprised by the ending of thefilm —-No. I ______the book, so I already knewthe story.
The little boy has been nice recently and he thinks he a toy train for Chirstmas.