A. singing  
B. are sing  
C. is singing  
D. is sing

2. It’s 8 o’clock. The students _________ an English class.  

A. have  
B. having  
C. is having  
D. are having

3. Listen! The baby _______ in the room.  

A. crying  
B. cried  
C. is crying  
D. cries

4. Look! Lily and Lucy ________ photos.

A. are take  
B. is taking  
C. taking  
D. are taking

5. What are the boys doing in the river? They ______.     

A. are swiming  
B. are swimming    
C. swimming  
D. are swim