He is always telling the director how to run the business, _________ is like teaching one's grandmother how to suck eggs.
One learns a language by making mistakes and_________them .
.I will do what I can_________ the people in trouble .
The teacher told us that water_________at 100℃ .
.It was three o’clock_________we finished the work .
—Which do you like , tea or coffee ? —_____________.