[ Tenses ]
We ____ in the doctor’s office for two hours before they called our name.
A. Been sitting
B. Had sat
C. sitting
D. Had been sitting
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Degrees of ComparisonRelative Clauses and Past PerfectCompliment, Congratulation, and HopeContractions and Conjunctions�Put� Phrasal VerbArticles with Proper NounsBare Infinitive and To InfinitiveNoun / Pronoun-Ing and Infinitive Verb PatternsPresent Simple & Present Continuous TensesOther quiz:
Grammar › Viewhe is eighty years old, he’s well and seldom sick.
A. Although
B. If
C. When
D. Because
Grammar › View
Which sentence uses the correct article?
A. A sun is a star at the center of a solar system.
B. An sun is a star at the center of a solar system.
C. The sun is a star at the center of a solar system.