[ Tenses ]
Last night, I ____ dinner when I ____ a scream.
A. had-heard
B. had had-was hearing
C. was having-has heard
D. was having-heard

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Grammar and Vocabulary › ViewAncestor worship is ………………….most important religious activity among the Bru-Van Kieu.
A. the
B. a
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Now everybody knows where you live.
You shouldn’t ….. ….. your complete address to your online friends.
___
A. have given
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A. starting out
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Grammar and Punctuation › View
Choose the correct vocabulary word that means ‘to make something complicated’
A. Simplify
B. Elaborate
C. Complicate
D. Explain