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baseballs
A. some
B. an

Random Topics:
V-ing/to-VZero & First ContidionalClauses and ConjunctionPassive Voice and ModalsIrregular Plural NounsPast Perfect and Past Perfect ContinuousWill vs Verb InfinitivesConditional and SubjunctiveModal and Modal Perfect1st and 2nd ConditionalsOther quiz:
Grammar › ViewThe men are busy. ____________ are repiring the roof of the building.
A. He
B. She
C. We
D. They
Present Perfect Continuous › View
They_____________ been ______________all day for the concert.
A. has…practise
B. have…practise
C. has…practising
D. have…practising
Passive Voice › ViewWhile I ____________ by Jane, the telephone rang.(Past Continuous)
A. were being introduced
B. is being introduced
C. are being introduced
D. was being introduced
Grammar › View
The exercises ______ difficult that students found it impossible to complete it.
A. are too
B. were so
C. is very
D. was such
