[ Grammar ]
“Our Internet connection was down yesterday. ” ” I’m sure that was frustrating.”
A. It could be frustrating.
B. It must be frustrating.
C. It can be frustrating.
D. It must’ve been frustrating.

Random Topics:
GerundsVerb PhrasesIN, ON & ATVerb TensesPhrases and TensesGrammar: MorphologyPrepositions & Prepositional PhrasesTenses, Determiners & Subject Verb AgreementComparatives and Past Perfect TenseWish - beginnerOther quiz:
Pronouns, Verb, Conjunction › ViewChoose the correct pronoun: “Emily has a dog. ___ dog is very friendly.”
A. His
B. Her
C. Their
D. Its
Vocabulary › View
to explain, make evident, or prove by the use of examples or experiences
A. evaluate
B. demonstrate
C. sufficient
D. relevant
Vocabulary › Viewa hypothesis regarding the solution to a crime
A. motive
B. theory
C. alibi
D. deduce
Grammar › View
She _______ some novels.
A. have written
B. have writing
C. have wrote
D. has written