Most probably it will be another 7 hours _____ you can have next meal, so each of you must have your stomach full.

A．since

B．when

C．after

D．before

减数分裂过程中同源染色体配对和联会复合体形成发生在减数第一次分裂前期的（）

A、细线期

B、粗线期

C、偶线期

D、双线期