(2013·大纲卷)Since nobody gave him any help, he have done the research on his own.
I always think it was such a(n) ______ for me to have spent a day with kids in the Children’s Home.
When delivering a speech, you should adjust your language to the age of your ______ audience.
Is this the reason _____ in the report for her success in the job ?
The extra room _______ very useful when we had visitors.
I ‘ ll help you_________.