胎儿期是指

A．受孕后8周

B．受孕后12周

C．受孕后28周

D．受孕后40周

E．从受孕到分娩共约40周

Because our work is very busy, so we need to relax at midday.

A．We are very busy

B．Our work being busy

C．Our work so very busy

D．Because our work so very busy,