Half the planet always faces the sun,while the other half is ( continue)______dark.
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When I was in England, l intended ( visit)__ Plymouth , but I failed to do so.
She thought it unnecessary ( argue)_ with him about it.
John is not a diligent student , for it is the ( three)___time he had been late , isn it ?
I remember my grandfather ( take)_______me to the mountains when I was about 5 yeans of age.