
Key to exercise 1A 


1) 
are 
2) 
is 
3) 
is 
4) 
are 
5) 
am 
6) 
are 
7) 
is 
8) 
is 
9) 
are 
10) 
are 
11) 
is 
12) 
is 
13) 
is 
14) 
is 
15) 
are 


