---Tom is so worried about the test that he said he was going to study all night.----Tell him he should quit _________and get some help. 

— Do you know why the teacher asks for me ? — He wants you to _____ your absence last night.

 It is reported that most of the people who are         drugs used to be wealthy.

We’d be very grateful if you could join us because your cooperation will _____ the timely completion of our project.

 —My spoken English is poor,  what shall I do? —＿＿＿an English language club to practice,  and you’ll be good at it.