—Was the boy saved? —No. The doctors tri
题型:选择题
问题:
—Was the boy saved?
—No. The doctors tried their best, _____ they failed. [ ]
A. and
B. or
C. but
D. so
—Was the boy saved?
—No. The doctors tried their best, _____ they failed. [ ]
A. and
B. or
C. but
D. so