He passed through a difficult period _____ after his marriage broke down. 

. --- This book by Tony Garrison is of great use for our course. --- But I think his latest one is______ worth reading.

_____._ much advice I gave him, he did exactly what he wanted to do.

It was raining heavily. Little Tom felt cold, so he stood ______ to his mother.

The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work.