[ Causative Verb ]
No clinical studies —- in this child disease research so far.
A. Had completed
B. Will be completed
C. Have completed
D. Have been completed
Select your answer:
Random Topics:
Nouns & PronounsGrammar (want to/ need to/ have to)VerbsPrepositions and AdverbsPast Perfect and Past Perfect Continuous TenseGrammar & VocabularyEnglish MorphosyntaxAcademic VocabularyAdverb of Frequency and TensesHelping and Linking VerbsOther quiz:
Modals › ViewI ____ swim
A. must
B. can
C. has
Vocabulary › View
immense
A. tremendous; very large
B. extremely; sharply; eagerly
C. humble; not boastful
D. extremely loud