Thank you for sending us ____ fresh vegetables of many kinds. You have done us ____ a great service.
He was wearing a lot of clothes to _____ himself from the cold.
They were_____ popular that their fans formed clubs in order to get more familiar_____ them.
Would you please keep silent? The weather report ________ and I want to listen.
You should inspect the wheels regularly, and replace them ______ they cause you trouble.
If you cheat in the exam, you’ll never ______ it.