---WhatshouldIdo?Ican’tsleepwellatnight.---Youshouldtak...

問題詳情：

--- What should I do? I can’t sleep well at night.

---You should take a long walk before ____ to bed.

A. go                  B. goes                C. to go           D. going

【回答】

D 

知識點：語法填空

題型：選擇題