knife now.

　　_______________________________________________________3．The expo will feature a series of events that enable parents and children to experience technology and have a fun together.

　　_______________________________________________________4．From the frightened expression on his face，we know he is frightening.

　　_______________________________________________________5．You needn't have taken the day off from work，which created a burden for everyone else.

　　_______________________________________________________6．I mightn't have enjoyed myself more-it was a perfect day.

　　_______________________________________________________7．I really enjoy listening to music until it helps me relax and takes my mind away from other cares of the day.

　　_______________________________________________________8． There is no wonder that you are tired.You've been walking for hours.

　　_______________________________________________________9．Using his hybrid rice，farmers are producing harvests twice as larger as before.

_______________________________________________________10．(2017年吉林东北师范大学附属中学净月实验学校高一下期中)They are putting too much carbon dioxide into the atmosphere which