1)This kind of medicine contains a harmful chemical_that causes diseases.2)The operation___ of the new machine is hard to learn.3) He devoted_a great deal of money to build the primary the primary school in his hometown4) The hat and clothes are a perfect match_____.5) After that began to follow__her teacher's ...
1)This kind of medicine comtains a harmful (chemicals化学品) that causes diseases(疾病).2)The (operation操作) of the new machine is hard to learn. 3) He (devoted奉献) a great deal of ...
