A：x=﹣3
B：x=2
C：x=3，x=﹣2
D：x=﹣3，x=2
用括号内所给动词的正确形式填空（共5小题；每小题1分。满分5分）
如果x=2y=1是方程组ax+by=7bx+cy=5的解，则a与c的关系是（ ）
Last night, I _______ computer games when my mother came into my bedroom. You can't imagine how embarrassed I was then!
