A.veryB.broadC.sameD.narrow
A. very
B. broad
C. same
D. narrow
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A.onlyB.simplyC.seldomD.often
A. only
B. simply
C. seldom
D. often
A.catchingB.throwingC.beatingD.playing
A. catching
B. throwing
C. beating
D. playing
A.thatB.whatC.ThingsD.books
A. that
B. what
C. Things
D. books
Not until the early years of the 19th century________what heat is.
A. man knew
B. did man know
C. did not man know
D. man did know