My pen-pal Andrew found ______difficult to learn Chinese well.
A. / B. that C. it
-- How long ______ you TV by the time I called?
-- For two hours.
A. had; watched
B. have; watched
C. were; watching
She stopped ______ and then ______ with us.
A. writing; talked
B. to write; talk
C. writing; talks
-- Which is your new neighbor, Liu Hua?
-- The man ______ T-shirt is red.
A. that B. whose C. which
I prefer ______ to .
A. reading; watching TV
B. read; watch TV
C. to read; to watch TV
I find ______ difficult to finish the work all by myself.
A. it B. that C. this