7、know how to increase my reading speed. 【解析】句中的howtoincreasemyreadingspeed是“疑问词+动词不定式”结构,在句中作宾语。如:Nickdoesn’tknowwhattobuyforhismother.Canyoutellmewheretofindthiskindofbike?【注意】what to do后不需要跟宾语how to do后必须跟宾语【拓展】“疑问词+动词不定式”结构:know,tell, wonder,ask,find out, learn+what, which,wh