问题补充：
Heilongjiang Province is north of Liaoning. Harbin, its capital city, lies the Songhuajiang River.
A. to; on
B. in the; in
C. 不填; on
D. to the; in
答案：
A. to; on
B. in the; in
(答案→)C. 不填; on
D. to the; in
解析：be/lie north of...位于……以北。Harbin lies on the Songhuajiang River.哈尔滨位于松花江畔；on表示“相邻，紧挨”。
