[ Past Perfect and Past Perfect Continuous Tense ]
When Bob went to bed last night, he __________ (brush) his teeth.
A. brushes
B. brush
C. had brushed
D. had brush
Select your answer:
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Grammar › ViewSarah Frances Whiting opened the —- of physics in the United States in 1878.
A. undergraduate teaching was in a second laboratory
B. second teaching laboratory of undergraduate
C. undergraduate teaching laboratory was second
D. second undergraduate teaching laboratory
Grammar › View
I must admit you ……. tried but I’m afraid the answer is still no.
A. did
B. will
C. do
D. have