Wemust______thattheexperimentiscontrolledasrigidlyaspossible.
A、assureI won't ________ those children making a noise in my house!
The terrible noise is ______ me mad.
Onlya(n)________fewwereinvitedtothedancingparty.
Seniormembersofthestaffcompetedeagerly________thepositionofsalesmanagerinthecompany.
Thefarmerhadtowearheavybootsinthewinterbecausethefieldsweretoowetand________.
