Don’t worry. It won’t be long ______we see each other again.
| A．before | B．since | C．until | D．as |
She'll never forget her stay thereshe found her son who had gone missing two years before.
| A． | that | B． | which | C． | where | D． | when |
My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive . 
| A．as | B．so | C．too | D．very |
—You speak very good French!
—Thanks. I __________ French in Sichuan University for four years. 
| A．studied | B．study | C．was studying | D．had studied |
The teacher together with the students ________ discussing Reading Skills that ________ newly published in America.（）
| A． | are; were | B． | is; were | C． | are; was | D． | is; was |
Not until I came home last nightto bed.
| A． | Mum did go | B． | did Mum go | C． | went Mum | D． | Mum went |