Build sentences by using the given words or phrases
1.It/ necessary/ persuade/ lazy students/ spend/ time/ resonably
2.It/ usually/ take/ one/ much time/ master/ language skills
3.It/ humorous/ my brother/ make/ little sister/ laugh/ happily
4.It/ not worth/ learn/ new words /by heart
5.It/ cost/ learner/ 250 usd/ complete/ English course.