I’ve tried very hard to improve my English. But by no means _____ with my progress. 　　[ ]

( )28.－_____ you put away your books－Yes,mum. I’ll do it at once.

The magician picked some persons from the audience _____ and asked them to help him with the performance

Three students in ten will go and _____ to stay in the classroom.

It’s a duty for friends to ________ each other when they are in trouble.