下列草坪草中，能耐强度低修剪的是（）
A、高羊茅
B、巴哈雀稗
C、匍匐翦股颖
D、草地早熟禾
参考答案：C
Having lived in China for 8 years, Helen has a good ____________ of both English and Chinese.
A．ability
B．guidance
C．command
D．program
