—I felt it very difficult to carry on the work all by myself.
—I could have helped you, but you _____me to.
A．hadn’t askedB．didn’t askC．haven’t askedD．don’t ask
B

這題考查時(shí)態(tài)的用法：因?yàn)镮 could have helped you,是“過(guò)去本可以幫你（卻沒(méi)幫），后面的你沒(méi)有叫我，是過(guò)去的事實(shí)。用過(guò)去時(shí)，選B。
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