[ Grammar ]
Did you see Karla? She just left in a hurry after receiving that phone call and she looked worried. I am sure, it ____________________ something serious.
A. Mustn’t be
B. Must be
C. May be
D. Might not be

Random Topics:
SentencesIndirect SpeechGender and GrammarPossesive Pronouns and Modals of AbilityConjunctions and TransitionsPreposition after some VerbsPresent Simple & Present Continuous TensesTo infinitive - GerundArticles and QuantifiersVerb Present Simple TenseOther quiz:
Quantifiers › ViewI think apples don’t cost ___.
A. some
B. little
C. much
D. enough
Verb Tense › View
Is the verb tense past perfect, present perfect or future perfect? ‘The physicist has calculated the trajectory of the particle.’
A. Past perfect
B. Present perfect
C. Future perfect
D. Simple past
Homonyms › ViewWriters like to live high above the world in a ___.
a. garret
b. garrote
Homonyms › View
The ___ went on for more than six weeks.
a. trail
b. trial
