Do you know the man     1    wrote this book？He was Jason，one of the engineers     2    came from Russia in the 1950s.He worked in the same factory     3    my father once worked. When he came to China，the first thing     4     he did was to visit the factory     5    did research on trolleybuses and found out the reason     6    China was so backward in it. Then he spent every minute     7    he could spare to help China develop transportation.    8    is mentioned above，Jason was a foreigner     9    made great contributions to our country and was a kind man to     10    we should say thanks.