He is a bit ill, but he goes to school _____at home.[ ]

________ I smoke here?—No. You are not allowed to smoke in public places.

A new bridge over the river now ,You can see many railway workers and engineers working every day．

We left the meeting, there obviously __________ no point in staying.

Mum, have you seen my mobile phone?—The one you bought last week? I’m sorry I haven’t seen ________.