Our teacher suggests English every day to improve our spoken English.
A. practising to speak
B. to practise to speak
C. to practise speaking
D. practising speaking
网友回答
A. practising to speak
B. to practise to speak
C. to practise speaking
(答案→)D. practising speaking
解析：practise/suggest+doing，不能跟不定式；故选D。