题干
He watches football matches __________ TV __________ Sunday morning.
A：at; on
B：on; on
C：in; in
D：at; in
答案(点此获取答案解析）
B
He watches football matches __________ TV __________ Sunday morning.
A：at; on
B：on; on
C：in; in
D：at; in
至少有一个为0”，应假设