制作桥枕时应使桥枕大面向上，并尽可能使树心（）。
A、向上
B、向下
C、靠低断面中心
D、任意
参考答案：B
For breakfast he only drinks juice from fresh fruit ________ on his own farm. (2009)
A．grown
B．being grown
C．to be grown
D．to grow
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