[ TOEFL ]
The helicopter is able to hover in ___________ powered rotors produce lift even at zero forward speed.
A. flight because of the
B. flying the
C. the flying of the
D. flight because the
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Verb + Infinitive or GerundAdverbs (manners & modifiers)Tenses (Present, Past, Future Forms)Active Voice-Present tenseCountable & Uncountable NounsAbilityNoun PhrasesGrammar : Must (Necessity)Vocabulary and PhrasesAdverb & Compound SentencesOther quiz:
Grammar › ViewThe plural of mouse is
A. mouses
B. mice
C. mouses
First Conditional › View
If you ….. my bike, I …. you with the maths homework.
A. repair, will help
B. repairs, will help
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Grammar › ViewI….(do) my homework now.
A. do
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Tenses › View
I had helped my neighbor before I fixed his car.
A. Future Perfect
B. Present Perfect
C. Past Perfect