[ Perfect Tenses of Verbs ]
By that time, the dance troupe had mastered the routine for their recital.
A. present perfect
B. past perfect
C. future perfect
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Grammar › ViewShe ________ her mother an hour ago.
A. is calling
B. calls
C. has called
D. called
Vocabulary › View
The ………………………… topic causes disagreement.
A. controversial
B. dynamic
C. influential
D. fictional
Past Tenses › ViewShe was crying when I …………… her
A. was seeing
B. were seeing
C. see
D. saw
Conjunctions › View
______ in 1636, Harvard is one of the most famous universities in the United States.
A. Founding
B. Founded
C. It was founded
D. Being founded