[ Grammar ]
Burning yard waste releases mold spores, soot, and other contaminants that can aggravate allergies and cause ____ problems.
A. respirator
B. respiration
C. respiratory
D. respired
Random Topics:
Clauses and GerundsSimple Future - WillModal AuxiliaryCorrelative ConjunctionAdjective ending with ED & INGAsking & Giving OpinionPast and Perfect TensesPresent, Past, and Future TimeZero ConditionalSimple Past ContinuosOther quiz:
Grammar › ViewA: Annie’s really afraid of having injections.
B: She ……………….. talk to her doctor about it.
A. must
B. ought to
Conjunction › View
We were very tired…….happy after our flight to Sydney.
A. and
B. but
C. or
D. so
Grammar › ViewMy mother and father ___________ to Australia.
A. have never been
B. has never been
C. has went
D. have went
Paired Conjunction › View
He is …….. intelligent, ……… very funny.
A. not only….but also
B. either……or
C. neither…..nor
D. both…..and