Chemical pollution will bring about a threat to agriculture and food chain, and ________ to human health.
A good advertisement should ____ the consumers and direct their attention to the product.
Look. There is a car coming fast the other direction.
The vocabulary and grammatical differences between British and American English are so few and unimportant as hardly______.
You can complain, but I doubt _____ it’ll make any difference.
How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?