答案(D)也可以
猜想, 以為[Y][+(that)][O2][O8]
I suppose he is still in town.我想他還在城裡。
期望; 認為必須, 認為應該[H][O2][O8]
You're not supposed to take the books out of the room.這些書不能拿出屋去。
必須以...為前提
Every effect supposes a cause.任何事的產生都必然有其原因。
(用於祈使語氣)讓...[+(that)]
Suppose we set out at six.我們六點動身吧。
假定[+(that)][O2]
Suppose the car should break down again.假定汽車又出毛病了。