-- Lisa was seen ______ an old man go across the street this morning. --What a kind girl she is! 

—Do you like reading books?—Yes. Each of us           to do more reading in and after class.

Sixteen-year-olds         to drive.

 ---There’s too much salt in the Chinese diet. ---So there is. The WHO says only 1.5 grams of salt __________ for each man every day.

Mr. Li ____ to give a talk in our school yesterday.