1. The first edition ______ in 1955 and ______ a bestseller ever since.
A. was published; had been
B. had been published; had been
C. has been published; has been
D. was published; has been
2. It seems water ______ from this tap for some time. We'll have to take it apart to put it right. (2012·长郡月考二)
A. had leaked B. is leaking
C. leaks D. has been leaking
