---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.

1. A.
   will; should hand
2. B.
   must; should have handed
3. C.
   may; can’t hand
4. D.
   can; could have handed

---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

       A．will; should hand                 B．must; should have handed

       C．may; can’t hand                D．can; could have handed

---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

         A．will; should hand                    B．must; should have handed

         C．may; can’t hand                   D．can; could have handed

---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

A．will; should hand                        B．must; should have handed

C．may; can’t hand                              D．can; could have handed

---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

A. will; should hand                                       B. must; should have handed

C. may; can’t hand                                              D. can; could have handed

---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.

---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.

—Who ________ it be that hasn't handed in his composition?

—It ________ be Robinson.He ________ it in yesterday.

A．can; will; should hand

B．can; must; should have handed

C．may; may; can't have handed

D．will; can; could have handed