It never occurred to humans until the mid-1990s ______ some animals can be cloned.
A. where B. that C. when D. what
I’ll prepare more dishes_________ your guests decide to stay for dinner．
A. in case B. in order that C. even if D. as if
Large quantities of information, as well as some timely help _____ since the organization was built .
A. has offered B. had been offered C. have been offered D. is offered
I am junior________my elder brother________four years.
A.to, by B.than, for C.to, for D.with, by
Was it the restaurant where he had dinner with me, if I may ask, _______offered him a job?
A.that B.where C.which D.when
He told me to ________, for he wanted to stay for a while all by himself.
A.leave him behind B.leave him out
C.leave him alone D.leave him off
