Compared with 2 million tons last year, our coal output has increased _____three times; that is to say, our coal output has increased_____8 million tonsthis year.
Ten minutes had been made full ____ of ____ the problem.
These flowers are pleasant to ______.
Tom’s dog became ill and died,____ made him very lonely.
Rather than ______ on a crowded bus, he always prefers a bicycle.
----Do you know our town at all? ----No, this is the first time I ____ here.