When ____ about the source of his income
题型:选择题
问题:
When ____ about the source of his income, he hesitated for a moment, obviously not willing to give us a direct answer.
A.asked
B.asking
C.being asked
D.having asked
When ____ about the source of his income, he hesitated for a moment, obviously not willing to give us a direct answer.
A.asked
B.asking
C.being asked
D.having asked