afford,notes,volunteer,slepy,concentrate,member,studying,wro

afford,notes,volunteer,slepy,concentrate,member,studying,wrong,points,stay up
读一下面的对话,选择恰当的单词填空.每词只限用一次.
P：Paula B：Bob
P：Hi,Bob．You look 8
B：I don′t feel great,Paula．
P：Is there something 9 Have you been to the doctor′t
B：No,I′m not i11．I'm just a bit tired．I′m probably not sleeping enough．
P：You shouldn′t go out so late then．
B：I'm not going out at all actually．I′m too busy 10 .I 11 last night.
P：Staying up?But the exams are two months away．
B：I know．but I've got a lot to do．I didn′t do much last term．1 wish I had been more like you!
P：Well,yeah,1 went to every class and I took lots of 12 ．After class I spent time looking through all the key points I made during class．
B：Have you started preparing for the exams?
P：Not yet．I'll start next week,but I'm not going to stay up all night doing it．If you don′t sleep enough．you can′t 1 3 and you don′t learn anything．Anyway you should have a weekend off．
B：I don′t think so．I can′t 14 the time．
P：Of course you can．Why don′t you go to do some 15 work with me?You used to be a member of our Helping Team．
P：I know,I do need some time to relax．