10.
He could not keep pace with the game,and as a result of his careless playing we lost.(p3)
(1)We ______ (必须跟上)the new development of modern scientific research.
(2)She worked so fast that I ______ (跟不上),and ______ (因此),I fell behind.
(3) ______ (由于他弄丢了票),We were not admitted into the theater.