The boy is old ____ _____look after himself.

The reason _______ he gave at the meeting was not the exact reason _______ he failed to show up on time.

The other day, my father drove his car down at ____ I thought was a dangerous speed.

What do you think of the match–Wonderful! Our team has never played__________.

下列各组词语中加点的字注音无误的一组是(　　)