[ Grammar ]
An air-conditioning system _______ a refrigerated gas like Freon to cool the air
A. Using
B. Use
C. Uses
D. Used
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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 › ViewCombine the following sentences using a conjunction: “It was raining. We decided to stay indoors.”
A. It was raining, so we decided to stay indoors.
B. It was raining, but we decided to stay indoors.
C. It was raining, or we decided to stay indoors.
D. It was raining, for we decided to stay indoors.
Tenses › View
Jim _________ his teeth twice a day.
A. brushes
B. brushed
C. brush
D. brushing
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