Though she did not know Boston well, she made her way_____to the Home Circle Building.

The conservation area is very important for preserving many animals and plants, which would ______ run the risk of becoming extinct.

–You seemed to have been impressed by his songs.--Well, not exactly so. It was his way of singing _____his voice that really impressed me.

The new machine, as is reported in the local newspaper, will work twice as fast, _____ greatly reducing costs.

Twenty million years ago, Idoho was not the dry place as it is now. ______, it was warm and damp, covered with thick forests.