[ Prepositions ]
They always laugh ___ my jokes, no matter how silly they are.
A. at
B. on
C. in
D. of

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Grammar › Viewkindly lend me your book.
A. interrogative
B. imperative
C. exclamatory
D. declarative
Grammar › View
There ______ several students in the director’s office.
A. is
B. are