We were all at a loss, ________ what was
题型:选择题
问题:
We were all at a loss, ________ what was behind this sudden change of the plan.[ ]
A. to wonder
B. wondered
C. wondering
D. wonder
We were all at a loss, ________ what was behind this sudden change of the plan.[ ]
A. to wonder
B. wondered
C. wondering
D. wonder