Michelle Obama wears clothes that anyone can buy in a mall and ________ she may have a larger effect on consumers than ordinary models.

---It is what parents say and do that really matters in children’s character training. ---______.

When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance. 

He is thought to be one of the most famous writers________.

Chemical pollution will bring about a threat to agriculture and food chain, andto human health.