—Where did you get this book?
—I picked it up from a second-hand bookshop if you ______know.
A. must B. will C. can D. shall
—What are you two whispering about over there?
—Oh, ______. Just small talk.
A. no B. nobody C. none D. nothing
When I ______home, I caught a thief stealing from a passer-by.
A. headed B. was heading C. has headed D. had headed
The Charles Dickens Museum in Doughty Street is the only one of his London homes to survive，
______he wrote Oliver Twist.
A. where B. that C. which D. what
______all the homework assigned by the school the students have to work at it till midnight
A. Completing B. To complete C.Having completed D. To have completed
Up to now, thousands of red phone boxes, the old image of Britain, ______ due to mobile phones.
A. removed B. have removed C.were removed D. have been removed
