Scientists still wonder ______ cloning will help or harm us and _____ it is leading us.
.--- Merry Christmas ! --- _________.
To go to bed early and to get up early_________good_________one’s health .
.—He was born in Shanghai but studied in Nanjing . —_________.
._________you don’t go there is none of my business .
One learns a language by making mistakes and_________them .