-Didn't you have a good time in the party?

-Of course I did. As a matter of fact, I  had such fun that time seemed to_________so quickly.    [ ]

A. go by    

B.go away    

C.go out    

D.go over

杂交育种所依据的主要遗传学原理是（）

A.基因突变

B.基因重组

C.染色体交叉互换

D.染色体变异