单项选择。
When will you leave China ___ Canada? [ ]
a. to
b. for
c. from
d. in
答案：B
She spent a happy afternoon her coins and stamps she had collected those years.
A．to look for
B．worked on
C．sorting out
D．watch over
期货公司与其控股股东在业务、人员、资产、财务、场所等方面应当严格分开，独立经营，独立核算。（）
