______ smoking, he would not have got cancer in the lung.

 Maybe if I ________ science，and not literature then，I would be able to give you more help.(2011·北京)

—Where have you been?—I was stuck in the heavy traffic. Otherwise I ____here earlier.

_____ U2, the Irish rock band from Dublin perform a concert in Beijing, tell me in advance.

The English teacher suggested Lily that she _________ more English books.