ok! From opposite the street _________, screaming in panic.

It has been announced that all the students ____ put on masks before going to school in case they are infected with SARS virus.

下列各句中，没有语病的一句是（ ）

What a clear blue sky!—Yes, I have never seen sky.

I will never forget the time________ I lived in the country with my grandparents[ ]