To live on Mars, you need to wear boots which ________ to prevent you from floating off into space.
---- You don't know what great difficulty I had _____ to get the two tickets. ---- But the film is really worth_______ twice.
— You should be careful when ________. — Yes, I will.I’d like to know when ________ to have a rest.
The red shirt doesn’t suit you.I think that black one __________good _________ you.
考点:介词/介词短语
The girl is so excellent that you ________ praise her too much.
The food in the fridge ________ bad.Throw it away, please.