Would you like _______ orange juice? —Yes, please.

What a big smile on Mr.Lee’s face! —Yeah. He is proud _______ his students’ excellent performance. [ ]

How many times have you been to China?— In fact, it is the third time that I __________ here.

Miss Gao teaches _____ English. We all like her lessons.

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.