Speaking of the online technology available for marketing, the author implies that the focus of the marketing change is on______.

In Chart 3, we can see the close relationship between the increase of vehicle population in the country and the growth of national economy.

________(要不是下雨), we should have had a pleasant picnic.

Environmental factors attribute ____ deaths in the world.

They lay face down on the beach, ________(背部暴露在阳光下).

I agree that______(世故的成人而不是孩子) are to blame for the problems in our education system,