问题:
What ________ you ________ when I rang you up last night?
A.are
B. doing
C.were
D. doing
E.do
F. do
G.have
H. doing
What ________ you ________ when I rang you up last night?
A.are
B. doing
C.were
D. doing
E.do
F. do
G.have
H. doing
A.are
B. doing
C.were
D. doing
E.do
F. do
G.have
H. doing
参考答案: