Of the two readable books, which do you think is ______ one for me to read?
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________?
A series of stimulus policies and supportive measures taken by the government ________ to promote change in the economic environment in this area.
Only when he returned ________ that the war had ended and the army had come back.
________, his idea was accepted by all the people at the meeting.
—________ no ad during TV plays.—Great move! I cannot tolerate those annoying ads appearing every several minutes.