21£®The ________ look on his face shows that he's greatly ________.

A£®terrified;  terrified      B£®terrified;  terrifying

C£®terrifying; terrifying     D£®terrifying; terrified

22£®They were often so ________ in their research that they skipped meals and rest.

A£®attracted  B£®absorbed  C£®drawn           D£®concentrated