[ Grammar ]
An air-conditioning system _______ a refrigerated gas like Freon to cool the air
A. Using
B. Use
C. Uses
D. Used
Random Topics:
Wish SentenceTo Infinitive/Bare Infinitive/GerundsTenses & PassiveBasic Grammar-ed and -ing AdjectivesPast Tense & Present Perfect TenseVerb and PrepositionAdjective SuffixesHave to / Do not have toPast Simple and Past ProgressiveOther quiz:
Grammar › ViewWhere …………………. the car?
A. Is
B. Are
C. Am
D. Be
Present Continuous Tense › View
Olla: Where is Mommy, Daddy?
Father: She is in the living room. She … movie on TV
A. watched
B. watches
C. is watching
D. will watch
Type of Sentences › ViewDon’t slam the door!
A. Imperative
B. Interrogative
C. Declarative
D. Exclamatory
Understanding Product Packaging and Tenses › View
What is the main purpose of a procedure text?
A. To explain a process
B. To persuade
C. To inform
D. To entertain