用所给词组的适当形式完成句子

　　　 be about to , be made up of , break out, at times, come about ,get down to , look into,

1.　　　　 We will have to____________ all the details of the event.　 　

2.　　　　 I ____________ close the door when suddenly the phone rang. 　　 　　 　　　　　　　　　　　　　　　　

3.　　　　 The population _____________ several nationalities.　 　　 　

4.　　　　 ____________ we should do some relaxing activities instead of just sitting there learning.　　　　　　　　　

5. Stop talking and______________ your work now!