We have to work hard, ______ we’ll lose the chance.
After losing the match for the third time, he became _________ to what others said about him.
This simple vehicle could let me ________ long distances in a fairly short time.
They have a good knowledge of English but little _______ they know about German.
If you go by ______ train, you can have quite a comfortable journey, but make sure you get _____ fast one.
______we understand things has a lot to do with what we feel.