As you know,it is my duty to________my younger sisters from being hurt when they are in danger.
---- Wasn’t it Dr. Wang who spoke to you just now?---- ____.
----- Have you finished all of the exercises?---- Yes, completely. _____is left.
The population of China is larger than____ of Japan.
This Englishman is good at writing, reading and _____ is kind to others.
What he said,_____, has nothing to do with what he did.