[ 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 › ViewMy class _______ many children.
A. has
B. have
Future Tenses › View
She ……… at a new restaurant next Friday.
A. is eating
B. eats
C. ate
D. eat
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