| 41. | The advance came so quickly that supply units had a hard time keeping up.
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| 42. | Can she outwit this master criminal while at the same time keeping herself safe?
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| 43. | No wonder that the small caps have had such a hard time keeping up.
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| 44. | You end up spen $ ing all your time keeping the gadgets running right.
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| 45. | Once restored, he had a difficult time keeping one.
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| 46. | She also seemed to be having a real tough time keeping her tube top on.
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| 47. | Understandably, men are having a hard time keeping up.
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| 48. | But the lies begin to unravel and Hari has a tough time keeping his girl.
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| 49. | Radio Shack has had a tough time keeping its ZipZap remote control cars in stock.
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| 50. | We have a hard time keeping up with them.
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