为保持工作环境的安静，搬动家具，开关门窗要避免发生过大的声响。

—What do you prepare _____ May Day?

—I prepare _____ some special food. [ ]

A. for; /

B. with; for

C. for; for

There ____ some milk and bread on the table.You can have them ____ breakfast.     [ ]

A. are; for

B. are; in

C. is; for

D. is; in

要正确处理好人口、资源、环境之间的关系，坚持科学发展观，走科教兴国可持续发展之路。[ ]

碱性焊条具有较高脱硫、脱磷的能力，（）性能好。

A.可焊性

B.抗裂

C.熔化

D.机械

粘结磨损