The meeting _____ next week will be of great importance.
A、tobeheldA
谓语动词用了将来时态，所以选不定式作定语，表将来。
Itrainedhardyesterday,______preventedmefromgoingtothepark.
Decisiononwhetherthemessageisrightorwrongshouldatleastcomeafter_____whatthemessageis.
Theyareeager_______abroad.
Theprofessoraskedaquestion,andDavid________agoodanswer.
Itisdifficultto________theimplicationbetweenthelines.
