(a) a hospital (b) a school
(c) an apartment (d) an office
(a) is having (b) to have (c) Ate (d) eats
(a) to go (b) went (c) to swim (d) are swimming
(a) wore (b) is buying (c) bought (d) sold
(a) like (b) are playing (c) are liking (d) were
(a) traveled (b) visit (c) go (d) are traveling
(a) country (b) language (c) flag (d) city
(a) listened (b) to listen (c) heard (d) is hearing
(a) is writing (b) sends (c) to send (d) to write
(a) languages (b) words (c) countries (d) people
Answer Keys:
(21) C; (22) C; (23) A; (24) B; (25) A; (26) A; (27) B; (28) B; (29) B; (30) A