16.arriving home she found her old friend already there.A. OnB. ForC. ByD. With17. He says he has the T-shirt,I ve never seen him wear it.A. afterB. sinceC. althoughD. if18. When Annathe room, a group of young men were talking eagerly round the table.A. entersB. has enteredC. was enteringD. entered19. --Do you mind if I open the window？A. Yes, pleaseB. No, go aheadC. No, please don tD. Yes,you d better do20. A museumin the city centre next year.A. will be builtB. will buildC. was builtD. built