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My English teacher is very knowledgeable_______ she has been to many countries.

The careless boy lost his key, _______ he had to wait for his mom in the cold.

       he didn’t help me find my lost wallet, I thanked him all the same.

You won't work out the problem ______ you understand it. So listen to me explain now.

___ Lily___ Lucy likes singing, but they are good at dancing.
A. Both; and            
B. Not only; but also              
C. Neither; nor

I won’t go to tomorrow’s party_____ I am invited.
A. if                   B. unless               C. When

It’s going to rain. You’d better take an umbrella_____you may get wet.
A. or                   B. and              C. but

The shop_____sells flowers is at the end of the street.
A. who              B. where            C. which

Peter can play the piano            he can’t play it well.
A. and                 B. but                C. or

_______ you use your dictionary often, your spelling will improve.