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
The plane here for ten minutes already.
A. has arrived B. has stopped C. has come D. has been
They borrowed a car _____ their neighbour.
A. toB. withC. onD. From
Mr Li ____ England. He ____ London for two weeks.
A. has been to; has been to B. has gone to; has been in
C. has been to; has been in D. has gone to; has been to
