he plants to a south-facing window,________they can absorb daytime heat.

intelligent people can often ________ the complex, a fool is more likely to complicate the simple.

The life-saving drug invented in 1897, which ________ aspirin, has helped increase the standard of people’s health greatly.

Do you believe a person will be alive forever —_______ It’s just a fantasy.

The company has turned ____ e-commerce.