—We should do what we can ________ the endangered animals.—Yes, it’s our duty_________ them.
—What are the flowers _______?—They are beautiful.
______ she did this, all would be well.
_______ the heavy rain, many people were late for work. Because B. Because of C. As D.Since
Tom _________ in making a model plane. It was a _________.
The trip will take us ________ days.