问题

It has been confirmed____________he wasn’t the person who stole your bike.
A:if
B:whether
C:why
D:that
B:whether
C:why
D:that
正确答案是:
同类题型
Is this the reason ________ at the meeting for his carelessness in his work?[ ]
The company is starting a new advertising campaign to ________new customers to its stores.
Mr Black must be worried about something. You can ____ it from the look on his face.
Though ________ of the danger, Mr. Brown still risked his life to save the boy in the fire.