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It was last Saturday ________ we visited the History Museum.

His English, ______ used to be very poor is now excellent.

_________ you take an active part in physical activity ______ be able to keep fit and stay healthy.

—______ Emily is in such a hurry?
—I don’t know. She might run to catch the bus.

This is _____ interesting a movie that I'd like to see it again.

He really can’t understand _________ he said was wrong.

I don’t suppose he could have gone to the job interview yesterday, __________?

Though the Rockets has got Harward, ________ remains no possibility ________ it will get NBA championship next season.

Though ____ the dangers of smoking to their health, smokers still find it hard to give up smoking.

As is known to us all, under no circumstances______ temporary economic development at the expense of the environment and resources.