I _______ have problems ________ English, but I can do it well now.A.was used to; to speakB.used to; speakingC.was used to; speakingD.used to; to speak
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B解析used to do sth.是“曾经/以前做过某事”，而be sued to doing是“习惯于做某事”，后面则是have trouble/problems/difficulty(in) doing sth.，其中in省略了．所以选B．