皮皮学，免费搜题
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搜题
【单选题】
We ____five English songs by the end of last term. A had learned B learned C have learned D will have learnedA.
had learned B learned C have learned D will have learned
B.
learned C have learned D will have learned
C.
have learned D will have learned
D.
will have learned
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】与命题公式 P →( Q → R) 等价的是( )
A.
(P ∨ Q) → R
B.
(P Λ Q) → R
C.
(P → Q) → R
D.
P → （Q ∨ R）