The opportunities for people to meet outside ( ) a lot
A.based on
B.take to
C.depend on
D.involve

单项选择题—德国牧羊犬精神沉郁，食欲差，尿液发黄。在暗视野显微镜下，可见病犬腹水中蛇样运动的菌体，镀银染色镜检见S形着色菌体。该犬最可能感染的病原是

单项选择题The bride’s mother made a lot of efforts to smooth over the wrinkles in her daughter’s dress, but, to her great disappointment, nothing much ()it.A.Came fromB.Came ofC.results inD.leads to