．Shopping online can_____both convernience and choice, but not _____ websites aresafe enoung for shopping.

rote a letter to her parents, ______ she missed them and was studying hard.

Washington, a state in the United States, was named _____ one of the greatest American presidents

I like reading books about ________ story of Sang Lan who has ________ positive attitude towards life.

You praise your son. He works harder than before. —Thanks, I will.