I rang you at about ten, but there was no reply— Oh, that was probably _____ I was seeing the doctor

It will take the workers two years______the tall building.

When will the train start？ —It _____ at 2:35 in the afternoon according to the timetable

What a fine day! Shall we go picnicking.—.But we need to be home before six o’clock for the football match.

下列各句中，没有语病的一项是（ ）