根据句意及所给的首字母，英语释义或汉语提示写出正确的单词。
1. You can look up the word in the d ________if you don't know it.
2. Don't________(fail to remember)to call me when you get there.
3. Mobile phones are________(流行的，普遍的)in the modern world.
4. Don't ________water. Can't you see the sign "Save Water"?
5. They won the basketball match yesterday. The ________was 5:3.