U.S.News____________rankingsofcollegessince1983.Theyareaverypopularresourceforstudentslookingtoapplytouniversitycampus.
A、maintains
B、ismaintaining
C、maintained
D、hasbeenmaintaining
Theopeningceremonyisagreatoccasion.Itisessential_____forthat.
A、forustobeprepared
B、thatweareprepared
C、ofustobeprepared
D、ourbeingprepared
Wecan____thetwoislandswithabridge.
A、unite
B、connect
C、relate
D、combine
Hesetupinbusiness____hisownandwasverysuccessful.
A、in
B、of
C、on
D、by
Underthis____pressuresomeoftherocksevenbecameliquid.
A、intensive
B、weighty
C、intense
D、bulky