mecompletelywhenIsai的精选

问题详情：—WhydidMikeignore(不理睬)mecompletelywhenIsaidhellotohim?—Oh,hewaskeeping________aproblem.A．thinkabout           B．tothinkaboutC．tothinkingabout  D．thinkingabout【回答】D知识点：动词...