— I usually walk for a while after supper every day.
— That’s good! Walking is a good ________ of exercise for both the young and the old.
| A．piece | B．form | C．pair | D．couple |
更新时间：2024-03-25 11:38:51
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【推荐1】We have shoes at very good price, two of sports shoes for only $78.
| A．much; pair | B．much; pairs |
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