(a) is sleeping (b) is teaching (c) is studying (d) is eating
(a) is studying (b) is writing (c) is speaking (d) is singing
(a) is reading (b) is talking (c) is doing (d) is cooking
(a) are talking (b) are writing (c) are playing (d) are making
(a) is running (b) is sleeping (c) is buying (d) is watching
(a) are running (b) are studying
(c) are helping (d) are swimming
(a) is trying (b) is playing (c) is making (d) is having
(a) are dancing (b) are having (c) are going (d) are making
(a) is sleeping (b) is walking (c) is speaking (d) is crying
(a) are drawing (b) are studying
(c) are eating (d) are having
Answer Keys:
(11) C; (12) B; (13) D; (14) C; (15) C; (16) D; (17) B; (18) C; (19) A; (20) B
