题干
—Were you at home yesterday?
—No, I________. I was ________ school.
A：
wasn't;at
B：
weren't; at
C：
weren't;in
D：
wasn't;in
答案(点此获取答案解析）
A
—Were you at home yesterday?
—No, I________. I was ________ school.
A：
wasn't;at
B：
weren't; at
C：
weren't;in
D：
wasn't;in
，那么小球在通过圆周最高点时绳的拉力大小为（空气阻力忽略不计）
