海南三亚一中月考3,24)So difficult _______it to work out the problem that I decided to ask Tom for some advice.
A.I did find | B.did I find | C.I’ve found | D.have I found |
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海南三亚一中月考3,24)So difficult _______it to work out the problem that I decided to ask Tom for some advice.
A.I did find | B.did I find | C.I’ve found | D.have I found |