—I’m considering _____ to Qingdao for my holiday by train.—Why not try _____ by ship for a change?going; to travel B. to go; traveling C. to go; to travel D. going; traveling
It has been announced that all the students ____ put on masks before going to school in case they are infected with SARS virus.
—Have you been to the Great Wall? —Perhaps not in my memory. ________, it might have been during my early childhood.
The question that puzzled them is ____ they can get rid of the air pollution in the area.
Teachers have to constantly update their knowledge in order to maintain their professional _____.
“I don’t think it’s my _______ that the TV blew up. I just turned it on. That’s all.” said the boy.