If you’re _______ trouble, you can ask the police _______ help.
The Greens used to live in London and now they ________ in Beijing.
The train was travelling _______ low speed at that time.
— Have you ever been to Sanya? — Yes, ________already.
—__________is it from Nanjing to Yangzhou? — About one hour’s bus ride.
The song was so sweet. We couldn’t stop__________along.