give up with one's help as long as great get lost work out

(1) I think mother's love is the ______ in the world．

(2) If you ______ in the city，you'd better ask the police for help．

(3) ______ I get something good，I will share it with my friends．

(4) Never ______ ，you will achieve your dream．

(5) Jack is smart， ______ ，I finished my work on time．