Do you know what Tom does all day—I know he spends at least _______ timewatching TV as he does spend doing his lessons.

The seller would sell the shirt for ten yuan, but the customer ________ eight yuan．

Shall we make a cake by ourselves instead of buying one—

．— Could you please tell me ______?— It’s next to the post office.

下列各句中，加点的成语使用恰当的一项是(　　)