[ Grammar ]
I ______ what the problem is by tomorrow.
A) will be discovering
B) have discovered
C) will have discovered
D) will be discovered

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IN, ON & ATPast Perfect vs Past SimpleTenses and ArticleCompound Words and SentencesMain Idea and Sentence StructureSimple Compound and Complex SentencesConjunctions and TransitionsConjunctive AdverbsPast simple vs Present perfectPassive Voice in Past and Present TenseOther quiz:
Grammar › ViewThey ………. three children.
A. has
B. have
C. having
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I’m feeling…….,so I’m going to go home, eat some chocolate, and go to bed early with a good book.
A. Depressing
B. depressed
Grammar & Vocabulary › ViewI have known Chris _______ we started school together.
A. since
B. for
Vocabulary › View
relating to the country or country life
A. duration
B. rural
C. exclude
D. analyze
