Peter received a letter just nowhis grandma would come to see him.[ ]

Aunt Li, who is the lovely boy in red in the picture— It’s my son. The picture ________ 10 years ago.

_________ that he _________set up more than ten branches elsewhere.

Waves of red light are about twice as long as _______ of blue light.

The boys ______ the newspaper on the groundand began to read the news and articles in it.