She prefers the sofa made of real leather although itcosts more than that made of ______ leather.

Who will go to America this summer, you or your brother—_________. We will go to Hainan together.

How do you study English so well— I study ________ reading English magazines.

It’s said that __________ is going to giveus a lecture

11. It is because people are likely to stayindoors ______ the virus can spread easily ______ people often catch colds.