[ Grammar ]
The first electric lamp had two carbon rods from which vapor serves to conduct the current across the gap.
A. The first
B. which
C. serves
D. to conduct
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Grammar - Present Perfect TenseCity PlacesQuantifiers & Modal VerbsDirect and Indirect SpeechAdjective and AdverbSentences and Non SentencesIdentifying Sentence TypesInterjections, Tag Questions and Nouns of Direct AddressPast Simple - Present PerfectSimple Present and Past TensesOther quiz:
Grammar › ViewAndi is a _______ boy. He climbed up the ladder ________.
A. careful – carefully
B. carefully – careful
C. careful – careful
D. carefully – carefully
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Her son (play) computer games since childhood.
a) has been playing
b) has played
c) have been played
Grammar › ViewMy mother told me to __________ on warm clothes before I went out.
A. get
B. taking
C. have
D. put
a, an, the, Zero Article › View
Which article correctly completes each sentence?
Did Ranita ____frog really sleep in Félipé’s bed?
A. A
B. An
C. The