问题
选择题
. The actor_____the children with all kinds of tricks, which they ___very much
A．entertained; entertained
B．entertained; enjoyed
C．enjoyed; entertained
D．enjoyed;enjoyed
答案
答案：B
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. The actor_____the children with all kinds of tricks, which they ___very much
A．entertained; entertained
B．entertained; enjoyed
C．enjoyed; entertained
D．enjoyed;enjoyed
答案：B
2SO3是放热反应，下列说法正确的是