_____ is hard is to do good all one's life and never do anything bad.
No one likes a person who _____ himself more than anyone else.
– Have you ever been to the city before? – No. This is the first time I _____ here.
_____ is necessary for us to tell him about the result.
Mrs Chen is very strict — we don’t dare to say a word _____ she asks us to.
– The lecture will begin at 4 o’clock in the afternoon, right? – Yeah, ____ you get there on time.