He goes to school by bus, but he walks ______after school.
It is _____ to cycle around Guilin.
My shoes are broken. They need ________.
He _____ in Shanghai for five years.
____ the Forbidden City is almost 600 years old, _____ it is still very beautiful.
I have __ a raincoat _____ an umbrella. That’s why I have to wait until the rain stops.