[ Interrogative Pronouns ]
——- is the tallest plant you’ve ever grown ?
A. who
B. which
C. what

Random Topics:
Comparison Degree & GerundsContrastive ConjunctionsAdjectives and VocabularyFuture Simple TensePresent, Past and Future TensePossessive Adjective and PronounMuch, many, a lot of, a few, a littleArticles & Compound NounsRelative PronounPast Simple and Past ContinuousOther quiz:
Grammar › ViewMarcela is 18. She is ____ vote.
A. old enough to
B. enough old to
C. old enough for
D. enough old for
Grammar › View
When I graduate from college next June, I _____________ a student here for five years
A. Will have been
B. Have been
C. Has been
D. Will have
The milk is cold _____ refreshing _______ I kept it in the refrigerator.
A. but, or
B. and, but
C. or, and
D. and ,because
Grammar › View
By this time next year, I ______ all my exams.
A. have taken
B. take
C. will have taken
D. will take