As well as having a national flag, many countries use a certain flower as their national _____.
49. --- Does he study very hard at school? --- Yes, he studies _____.
48. I will ask my father to telephone you _____ he comes back.
47. I'd like to go with you. , I have to finish the report now.
46. Oh, you can’t go out now. It is raining very _____. You’d better stay here for a while.
45. If the wind doesn’t _____ before three o’clock, we will not be able to take off today.