—Hi, Johnson, any idea where Susan is? 
—It’s class time, so she          in the classroom now.

—Hi, Johnson, any idea where Susan is? 

   —It's class time, so she          in the classroom now.

   A. can be                      B. must have been            C. might have been D. should be

—Hi, Johnson, any idea where Susan is? 

—It’s class time, so she          in the classroom now.

1. A.
   can be
2. B.
   must have been
3. C.
   might have been
4. D.
   should be

---Hi, Johnson, any idea where Susan is?
---It's class time, so she______in the classroom now.

1. A.
   can be
2. B.
   must have been
3. C.
   might have been
4. D.
   should be