I arrived early for the meeting so I was（ ）my thumbs for half an

I arrived early for the meeting so I was（ ）my thumbs for half an hour.
A、turning
B、touching
C、twisting
D、twiddling
【正确答案】：D
【题目解析】：turn v. 转动，旋转 touch v. 触碰twist v. 弯曲，扭曲 Her face twisted in anger. 她气得脸变形了。twiddle v. 摆弄 twiddle your thumbs （等待之际）无所事事I sat twiddling my thumbs waiting for him to finish using the phone.句意：开会时我早到了半个小时，所以我无所事事地耗了半个小时 。