The scientist knew nothing about the matter because he was always _____ himself _______his study.
A.burying; in B.buried; in C.devoting; in D.devoted; in
I was told that there were about 50 foreign students _______ Chinese in the school, most of _______ were from Germany.
A.study…them B.study…whom C.studying…them D.studying…whom
Unluckily, not everyone has realized the important role the balance of nature _______ in their daily life.
A.makes B.plays C.acts D.does
The comments which he made _________ marketing bothered his boss greatly.
A.being concerned B.concerned
C.be concerned D.concerning
You can never imagine what great trouble I had ______ the poor boy and the little dog _____ were seriously hurt.
A.help; which B.to help; that C.helping; that D.helped; who
He said he had _______ all the books on the floor. In fact, he was _______.
A.lay; lying B.laid; lying C.lay; laying D.lied; laying
