1) They ... singing. a) are b) is c) isn’t d) aren’t 2) They ... climbing. a) is b) am c) are d) aren’t 3) She ... jumping.  a) is b) are c) isn’t d) am 4) He ... fixing his bike. a) is b) aren’t c) am not  d) are 5) He ... singing. a) aren’t b) isn’t c) is d) am 6) They ... jumping. a) isn’t b) are c) aren’t d) is 7) I ... sleeping. a) am not b) isn’t c) aren’t d) am 8) He ... riding a bike. a) aren’t b) am c) are d) is 9) She ... singing. a) are b) is c) isn’t d) am not 10) We ... flying. a) aren’t b) is c) am d) are

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