题干
Vivian refuses ______ her children to the weekend training centre for extra classes.
A：to send
B：sending
C：sent
D：sends
答案(点此获取答案解析）
A
Vivian refuses ______ her children to the weekend training centre for extra classes.
A：to send
B：sending
C：sent
D：sends
r=
d=
是正方形d=
长方形的周长是 