[ Present Perfect Continuous Tense ]
How long … properly in the gym?
- has he been working out
- have he been working out

Random Topics:
Adjectives or AdverbsPrepositional PhraseActive vs. Passive VoiceComparative and Superlative AdjectivesParts of Speech and GrammarAdverb & Compound SentencesProgressive Perfect and Simple Verb TensesTenses - Pasive VoicePassive Voice Present SimpleDependent ClausesOther quiz:
Passive Voice - Present Continuous › ViewThe final football match _____________________ by everyone. (watch)
A. are being watched
B. is being watched
C. am being watched
Grammar › View
Which is the complete subject of the following sentence?
The white blood cells in your blood fight disease.
A. The white blood cells
B. The white blood cells in your blood
C. The white blood
D. The white blood cells in your blood fight
Teresa Teng _____ a Taiwanese singer. She _____ from 1953 to 1995.
A. is … lives
B. was … is living
C. was lived
D. is lived
Conditional Sentence Type 1 › View
If he … the book, I will borrow it in my university library.
- hasn’t
- doesn’t have
