问题

____ caused the accident is stilla complete mystery
A:Competing
B:Having completed
C:To have completed
D:To complete
B:Having completed
C:To have completed
D:To complete
正确答案是:
同类题型
They didn’t come to the meeting ________ the heavyrain.
I recognized you I saw you _____ at the airport though we hadn’t seen each other for many years. [ ]
My sister takes in the gym every day.
Lily, can you help me ______ — Sure. Where’s the brush
I’m ____ in what ____ you —Well, don’t follow suit. Just do what you like.