[ 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
Random Topics:
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 and Vocabulary › ViewWhich word is different from the bold word? Check () A, B, or C.
A. shop
B. school
C. doctor
Future Tense › View
Don’t go to her house at 7:00 tomorrow morning because she … class at this time.
A. will attending
B. will attend
C. will have been attending
D. will be attending
Grammar › ViewI….(do) my homework now.
A. do
B. doing
C. am doing
D. am do
Tenses › View
I had helped my neighbor before I fixed his car.
A. Future Perfect
B. Present Perfect
C. Past Perfect