It's_________you do it fight now_________makes a difference.
| A．what; which | B．what; that | C．that; that | D．how; which |
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.
| A．very | B．far | C．fairly | D．quite |
John was dismissed last week because of his ______ attitude towards his job.
| A．informal | B．casual | C．determined | D．earnest |
Since Tom ______ downloaded a virus into his computer, he can not open the file now.
| A．readily | B．horribly | C．accidentally | D．irregularly |
It is not socially ____for parents to leave children unattended at that age.
| A．accessible | B．adorable | C．adaptable | D．acceptable |