He is a teacher. He has been a teacher ____ 1990.
A. in B. until C. since D. For
Italy is famous for ________.
A. the Eiffel Tower B. the Tower Bridge
C. the Leaning Tower of Pisa D. The Little Mermaid
My brother has never been late for work, __________?
A. is he B. isn’t he C. has he D. hasn’t he
This is a cheap and simple process(过程), ____ ,there are dangers.
A. but B. so C. because D. However
Have you returned the book to the library ____?
--- Yes, I have ____ returned it.
A. yet, yet B. already, already C. already, yet D. yet, already
When the teacher came in , the students about the new film .
A. are talking B. were talking C. talked D.talking
