[ Adverb Clauses ]
By the time Alfonso finally graduated from high school, he_____ seven different schools because his parents moved frequently.
A. attended
B. was attending
C. had attended
D. had been attending

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Adverbial Clause of Cause and Effect › ViewThe sunrise was so beautiful, so they took the picture.
What is the cause?
A. The sunrise was so beautiful
B. so they took the picture.
Vocabulary › View
He hasn’t performed for over 20 years but now he’s ___.
A. dating
B. making a comeback
C. on sale
D. beyond his reach
Comparison › ViewEnglish is ________ than Chinese. (easy)
A. easier
B. more easier
C. the easy
D. the easiest
Vocabulary and Grammar › View
We should __________ more fruits and vegetables.
A. has
B. had
C. have
D. having
