Mother always complains that children _____ their shoes very quickly.
Only by practising a few hours every day _______ be able to master the language.
_______ the people have become masters of their country _______ science can really serve the people.
—I would never come to this restaurant again.The food is terrible! —_______.
The old couple have married for 40 years and never once _______ with each other.
I just wonder _______ that makes him so excited.