[ Relative Clauses ]
The reason _____ he left is unclear.
A. who
B. that
C. whom
D. whose

Random Topics:
PrepositionTOEIC Grammar and Vocabulary ReviewTOEICGrammar and ReadingArticles and Quantifiers-ing / Infinitivetake, make, doLexico and GrammarVocabulary : Coming & GoingIELTS VocabularyOther quiz:
Reported Speech › ViewShe said, “I woke up early.”
A. She said that she had woken up early.
B. She said that she has woken up early.
Vocabulary › View
My mother spent the whole afternoon cleaning up the house. Now the house is ______.
A. potlessly clean
B. hopelessly clean
C. spotlessly clean
D. carelessly clean
Grammar › ViewI ____ the movie last weekend.
A. watch
B. watching
C. watched
D. watches
Vocabulary › View
What is the process of thinking of solutions and problem solving called?
A. Feedback
B. Troubleshooting
C. Empowerment
D. Composure
