Plenty of,get along with,let...down,come up with,in the slightest

Plenty of,get along with,let...down,come up with,in the slightest
1.how are you_______your work?
2.They do not like doing too much homework_______.
3.They are too busy.they have________work to do every day
4.He thought hard and then he________a good idea
5.If i were you,i would never________others_________.