The Science Museum , ________ we visited during a recent trip to Britain , is one of London’s tourist attraction.

Why did your father get ______ with you just now— Because I did even ______ in the writingcompetition this time.

w diplomat, he often thinks of hecan react more appropriately on such occasions.

I can’t quite remember ___ you started doing the work.

The Arabian Nights _____ well known all over the world, in which many a story_____ interesting and instructive．