Itisprettywellunderstood______controlstheflowofcarbondioxideinandoutoftheatmospheretoday.
A. that
B. when
C. what
D. how
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______hewillbeinthefutureis not knowntous.
A. What
B. That
C. Whether
D. Why
_________wasnotourconcern.
A. Nomatterhowhemightpasstheexamination
B. Whetherhepassedtheexaminationornot
C. Thoughhemightpasstheexamination
D. Whether did he pass the examination or not
ThereasonwhyIplantogois________ifIdon't.
A. becaustshewillbedisappointed
B. thatshewillbedisappointed
C. becauseshewillhavebeendisappointed
D. forshewillbedisappointed
________breaksthelawshouldbepunished.
A. That
B. Whoever
C. One
D. Theperson
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