It’s cold outside. You’d better your coat.

Is the door_____now? It’s so cold.—Sorry,I will keep the door________.

The number of books in the bookshop is about 10,000 and a number of them about science.

Do you hear there was _______ fire in the shopping mall last night?－ Yes. I never thought _______ fire can be so terrible.

Such good use has been____ his spare time_____ his English has improved a lot.