请将锁和对应的钥匙连线。
these——those lose——win throw——catch
this——that easy——hard heavy——light
记f(x)=2x的反函数为y=f-1(x),则f-1(4)=______.
—Mum, it is nice weather. I want to skate this afternoon. —Don't you think the ice on the lake is too thin to ()your weight
A. stand
B. bear
C. catch
D. take