The cost of organic food is higher than _____ of conventional food because the organic price tag reflects more closely the true cost of growing the food．

The medicine won’t cure her—it________stops the pain[ ]

“ Isn’t that Tom playing basketball” “ It______ be; he fell off the ladder yesterday and got badly hurt”

Anyway, Jack knows _______ help about travelling .

________atmospheric haze(雾霾天气) or smog will continue makes the public worried