A.timeB.eraC.aspectD.period
A. time
B. era
C. aspect
D. period
查看答案
A.explodedB.opened upC.dug outD.explored
A. exploded
B. opened up
C. dug out
D. explored
A.calledB.knownC.by nameD.named
A. called
B. known
C. by name
D. named
A.weaponB.mixtureC.explosiveD.discovery
A. weapon
B. mixture
C. explosive
D. discovery
A.whenB.asC.thenD.while
A. when
B. as
C. then
D. while