Although he explained again and again, he could not make himself ________ by all of us．

1. A.
   undertand
2. B.
   understanding
3. C.
   understood
4. D.
   be understood

Although he explained again and again, he could not make himself ______ by all of us．

A．understand            B．understanding          C．understood            D．be understood

Although he explained again and again, he could not make himself _________by all of us.

A.　　  understand　　　　　　   　　　　　　  

B.　　  understanding

C.　　  understood　　　　　　   　　　　　　  

D.　　 be understood

A.　　  understand　　　　　　   　　　　　　  

B.　　  understanding

C.　　  understood　　　　　　   　　　　　　  

D.　　 be understood