[ Grammar ]
We __________ keep our place clean.
A. must
B. make
C. let
D. mustn´t

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Modal › ViewYou should …………….. hard to get high marks.
A. study
B. to study
C. studied
D. studying
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________ was the sun clock invented ? Egypt .
A. where
B. when
C. why
D. who
Subject Verb Agreement › ViewNeither the students nor the teacher _______ (be) in the classroom.
A. is
B. are
C. were
D. was
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A book of synonyms, often including related and contrasting words and antonyms.
A. thesaurus
B. subject
C. propaganda
D. dictionary
