【题目】We didn't know you were in trouble at that time, ________ we would have given you a hand.
A．therefore B．however
C．otherwise D．though
在线课程【答案】C
【解析】
试题分析：考查副词辨析。A．therefore因此；B．however 然而；C．otherwise否则；D．though 虽然；句意：我们不知道你当时有麻烦，不然我们就会帮助你的，根据语境可知选C项。
考点 : 考查副词辨析