Air quality in our city is becoming worse and worse. – Yes. These days’ PM2.5 readings are frightening. We must do something to _______ air pollution.

What ______ the forest of Yangzhou in the last 30 years?—Yangzhou has become much greener.

Have you found your watch? —No, it is ______to see anything in the hole.

It’s very kind _____ you to help me carry the boxes since it is difficult ______ a person like you to carry so heavy things. [ ]

My friend Vivian is angirl.