Cheer up! Everyone may have periods in their liveseverything seems tough．

touch your eyes, nose and mouth, because they aren’t covered by skin and can ________ the virus easily.

In the time of economic crisis, every coin _________ a lot.

David asked______ in China. —– Of course not. Chinese usually shake hands with a lady as a greeting.

Who should be responsible for the accident? -The boss, not the workers. Theyjust carried out the order.[ ]