Mo Yan said he would never forget those years ________ he lived in his hometown with his family, ________ has a great effect on his life.

A．when; that        B．that; which        C．which; who        D．when; which

It was at the very beginning ______ Mr Smith made a decision _____we should send for a doctor.

I’ll never forget the years______I lived in the country with the farmers,______ has a great effect on my life.

A.that;which                 B.when;which               C.which;that                 D.when;who

I shall never forget the day ________ Liu Xiang won the gold medal, _________ has a great effect on my life.

A. when; which      B. that; which        C. which; that               D. when; that

It was just at the time      the bell rang       he finished the last word in his composition.

    A．when; which    B．that; when     C．when; that     D．that; which