Although ______ for many years, the two old sisters recognized each other at once.

Since no other way to escape from the flood, ____ only safe thing is to take ____chance.

“_____ when does the pub stay open？”  “About midnight.”

--- What are you going to do tomorrow?--- I will go _____ with my friends on the lake.

You should try to get a good night’s sleep ____ much work you have to do.