— Shall Mary come to the concert with us?
-Not_____she has finished her paper.
A.since
B.once
C.when
D.unless
答案:D
由句意得知,补全句子应该是Mary does not come to the concert with us unless she has finished her paper.
— Shall Mary come to the concert with us?
-Not_____she has finished her paper.
A.since
B.once
C.when
D.unless
答案:D
由句意得知,补全句子应该是Mary does not come to the concert with us unless she has finished her paper.