[ Grammar ]
They ________ the computer long time ago
A. have invented
B. has invented
C. invented

Random Topics:
Nouns as AdjectivesPronoun Antecedent AgreementConditional ClauseSimple Past TensesReflexive Pronouns & Modal VerbsSimple Verb TensesAll, Both, Neither, None, EitherModal Auxiliary VerbsPresent Perfect TenseSimple Present Tense with Adverb of FrequencyOther quiz:
Subject – Predicate › ViewWhich sentence contains a compound subject?
A. Living inside the old barn were a large brown horse and a short white cow.
B. Only two dozen children rode the bus that day, but it was still very noisy.
C. The green cicada is an insenct found in yards and parks all over town.
D. A small lizard slithered his way under the rock and out of sight.
Modals of Obligation › View
I _________________ wear my ID every class. It is mandatory.
A. don’t have to
B. should
C. can’t
D. have to
Grammar & Vocabulary › ViewThe house was __ by trees.
A. stunning
B. sheltered
C. decorated
Tenses › View
Their car broke down while they _____________ home.
A. were driving
B. was driving
C. had driven
