Question

---Look! Such heavy traffic!
--- I doubt _________ or not I can get to school on time.

A．if

B．when

C．whether

D．why

Answer 1

C  

試題分析: 句意：看，路太堵了！我懷疑我們能不能準時到校。賓語從語中有or not 只能用whether，不能用   if,故選C。