自强的人都会面临一只拦路虎,那就是____。只有战胜它,才能自强,才会进步。
调皮的小猫在跟你捉迷藏,你能找到它吗
Where is the cat?
—It's so late. Why not write the report tomorrow?—But I don't know _______ I can do it if not now.