Aftermonthsofvoyage,Columbusarrivedin______laterprovedtobeanewcontinent.
A、where
B、which
C、what
D、that
Hewas______towithdrawfromrunningforthepresidency.
A、trusted
B、credited
C、convinced
D、believed
Theyareeager_______abroad.
A、travel
B、travelled
C、totravel
D、travelling
Ittookmeamonthtogetrid_______thecough.
A、for
B、as
C、of
D、over
A、满足不孕妇女养育孩子的正当愿望
B、满足代理母亲乐意助人的良好愿望
C、代孕是一种合作生殖
D、代孕可能引起的商业化问题可以通过管理解决