The Atlantic Ocean is only half as big as the Pacific， ______ it

The Atlantic Ocean is only half as big as the Pacific， ______ it is still very large.
A、but
B、and
C、so
D、therefore
【正确答案】：A
【题目解析】：根据后半句still“仍然” 可判断为转折，因此选A but。原句译为“大西洋只有太平洋的一半大，但是它仍然很大”