1 . There are many _________________(时刻) when people don’t know what they want. (根据汉语提示单词拼写)

2 . There’s no simple______（解决办法）to this problem.

3 . There are four o_______ on the earth and the Pacific Ocean is the largest. (根据首字母单词拼写)

4 . The geography teacher tells us that there ________(存在) a pull between the earth and the moon.  (根据汉语提示单词拼写)

5 . There is no________(线索) to the identity of the thief. （根据汉语提示单词拼写）