Chuyển các câu sau sang câu bị động 1/ I am reading a book now 2/ She met me last night 3/ We will send her a postcard 4/ I have studies English for 5 years  5/ She seldoms visits him 6/ He like coffee 7/ Jonh has left his house since last week 8/ You should use a pen 9/ We must study many subjects 10/ The dog is chasing the cat