One way to understand thousands of new words is to gain ________ good knowledge of basic word formation.
— Did Jack come back early last night?— Yes. It was not yet eight o’clock ______ he got home.
The hunter insisted that he _____ a tiger and that a searching team ______ to hunt for it.
Are you clear _____ what has been taught in this class? That is: Is everything that has been taught in this class clear _____ you?
The determined look in their eyes told us that nothing could make them ______.
---Where did you pick up this wallet? ---It was in the supermarket _____ I did some shopping yesterday.