A.development;impossible
B.experiments; optional
C.advances;necessary
D.attempts;undesirable
第1题
A.complained
B.mumbled
C.uttered
D.gossiped
第2题
A.there are
B.where there is
C.in which is
D.which has
第3题
A.when John Bumstead and Orvan Hess saved
B.saved John Bumstead and Orvan Hess
C.did John Bumstead and Orvan Hess save
D.that John Bumstead and Orvan Hess
第4题
A.somewhere
B.sometimes
C.something
D.somewhat
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