[ Grammar ]
___ hour ago we met ___ history teacher.
A. A / an
B. A / a
C. An / a
D. An / an
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Passive Voice - Present ContinuousConditionals and Modal VerbsTenses and ArticleFamily Vocabulary and GrammarTime ConjunctionsPast Simple and ContinuousPersonal & Possessive PronounsRelative Clauses and Past Perfect�Put� Phrasal VerbGrammar - Verb FormsOther quiz:
Infinitives › ViewWe found it very difficult _____ with Gamma.
A. to work
B. work
C. working
D. worked
Grammar › View
Identify the subject and the verb of each sentence:
Next week astronauts will walk on Mars.
A. subject: Mars
verb: walk
B. subject: astronauts
verb: will walk
C. subject: Mars
verb: next
D. subject: astronauts
verb: next week
We often ……………. our relatives in Summer.
A. visit
B. visited
C. have visited
D. visits
Prepositions › View
We have to apply effective measures to save many plant and animal species……..extinction.
A. from
B. in
C. for
D. on