题目内容：

1、It____ten years since he left Shanghai.
A.were B.is C.had been D.will be
2、She____sick for two days before Thursday.
A.had been B.was C.has been D.is being
3、As a boy,James Watt,who invented the steam engine later,____
questions.
A.always asks B.has always asked
C.was always asking D.had always asked