The principal called us to his office but I couldn’t go.
A. The principal called us to his office but, I couldn’t go.
B. The principal, called us to his office but I couldn’t go.
C. The principal called us to his office, but I couldn’t go.
D. No commas needed.

Random Topics:
ArticleModals and TensesPresent Simple and ContinuousPhrases and ClausesModals and Semi-ModalsAsking & Giving AttentionSimple Present and Present ContinuosModals - Reported Speech - ConditionalsQuestion TagsPresent Simple & ContinuesOther quiz:
Grammar of Future Plans › ViewWhich sentence correctly uses a verb to express a general future plan?
A. I expect going to the store tomorrow.
B. I hope to finish my project by next week.
C. I plan going to the gym later.
Conjunction › View
I haven’t seen Mary _____ she left school last year.
A. since
B. before
C. unless
Grammar › ViewI’m not sure but I think I ___ my exam.
A. will not pass
B. am not going to pass
Vocabulary › View
What is the definition of coveted?
A. The process of conveying information without using speech
B. Desired
C. A fixed allowance for food consumption usually during a shortage
D. Advising
