Tom’s father works ________ the chief engineer ________ a big company. He always works ________ high standards.
---Where’s Li Hua?---Look! He _______ tennis on the playground.
He is a very honest man. He never _______ lies.
It’s difficult for me to decide which one to choose, because ______ of them are good.
Mr. Li regards Ningxia as his second_______ because he has been here for over twenty years.
Bob is young, _______ he knows a lot.