改错 Mr．Smith cannot afford buying his son a piano．
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改错
Mr．Smith cannot afford buying his son a piano．
试题答案
答案：buying→to buy
解析：afford to do表示“支付得起做某事”。
改错
Mr．Smith cannot afford buying his son a piano．
答案：buying→to buy
解析：afford to do表示“支付得起做某事”。