[ Grammar ]
Unless the new treatment __, it may cause harm.
A. be thoroughly tested
B. has been thoroughly tested
C. was tested thoroughly
D. will test thoroughly

Random Topics:
Preposition & GerundComparisonModals, Phrasal Verbs, Gerunds and InfinitivesSubjunctivesVocabulary and Sentence StructureMix-TensesFirst Conditional SentenceCoordinate ConjunctionPresent Progressive TenseHow often - long - much - manyOther quiz:
Tenses › ViewThey _____ a movie last Friday.
A. watch
B. watches
C. watching
D. watched
Grammar › View
should progress ? high speed
A. How fast
B. How long
C. How far
Tenses, Tag Questions, Phrasal Verbs › ViewYour sister lives in Spain, ______________?
A. doesn’t she
B. isn’t she
C. is she
Pronoun › View
We wanted to come on time, but …bus was delayed
A. Its
B. ours
C. our
D. your
E. yours
