—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 asked | B．didn’t ask | C．haven’t asked | D．don’t ask |
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—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 asked | B．didn’t ask | C．haven’t asked | D．don’t ask |
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