It is (polite) to keep others waiting in many western countries.
After doing sports for months, Tina is becoming (thin) than before.
Forty (year) development has changed Huai'an into a modern city.
To my surprise, my uncle got his driving licence in his (fifty).
Andrew often does DIY with different (knife) in his free time.
The journey was a little boring. We didn't enjoy (we) at all.