[ Prepositions ]
“Why did you open my letter?” “I’m sorry. I did it _____ mistake.”
A. with
B. at
C. by
D. on

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Grammar › ViewWhich sentence has an adjective clause?
A. After I cam back home, I watched an interesting film.
B. Twitter, which is used by 1.80 billion people, was founded in 2005.
C. Don’t forget to close the door before you go.
D. I am looking forward to visiting you soon.
Grammar and Structure › View
By the time they came, we ______ our dinner.
A. had finished
B. finished
C. would finish
D. were finishing
Grammar › ViewMy brother (have) …………..a red car.
A. haves
B. has
C. is having
D. are having
Grammar › View
Mom usually (cook/cooks) dinner on the stove.
A. cook
B. cooks
