问题

Will you be able to see Jennifer’sparents when the first class is overI’m afraid not I ______ a lecture onBritish literature in the hall
A:Was it when; that
B:When was it; that
C:Was it when; when
D:When was it; when
B:When was it; that
C:Was it when; when
D:When was it; when
正确答案是: