Look! She’s running so fast! —Hard to her legs were once broken.

My son is _____ to be seen. Where has he gone — I think he _____ in the building.

下列各句中，没有语病的一句是（ ）

where have you been We _____ you since 2 o’clock.

In many European countries, one has to decide much earlier what one’s career is going to be, and there is less freedom in changing one’s decision _____one has chosen a particular path[ ]