Stephen Hawking believes that earth is unlikely to be the only planet life has developed gradually.
--- What would you do if it ______tomorrow? --- We have to carry it on, since we’ve got everything ready.
The policeman warned the driver ______ so carelessly.
The old town has narrow streets and small houses ______ are built close to each other.
People all over the world are all ______ about the relationship between China and Japan.
Despite such a big difference in ______ towards what one eats, there is no doubt that people in the west regard the Chinese food as something special.