[ Subject Verb Agreement & Subjunctive Mood ]
A number of engineers … trying to fix the problem.
A. am
B. be
C. is
D. are

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There is, There are, Some, AnyIELTS GrammarReported - GerundCorrelative ConjunctionInfinitive and GerundsAsking and Giving SuggestionGrammar - First ConditionalIrregular verbsOpinion / AgreementInterrogative PronounsOther quiz:
Pronoun vs. Pronouns › ViewRalph didn’t like his haircut.
A. His
B. Like
C. Haircut
Tenses › View
If you eat all of that cake, you ______________ (feel) sick.
A. will feel
B. would feel
C. feel
D. feels