--- I’m not good at singing, you know. --- ________! It’s just for fun.
Speaking of all the songs he has written, I think this is probably his____one. better-known B. well-known C. best-known D. most-known
After two years’ research, we now have a ____ better understanding of the disease.
John was dismissed last week because of his ______ attitude towards his job.
Since Tom ______ downloaded a virus into his computer, he can not open the file now.
It is not socially ____for parents to leave children unattended at that age.