5.19Nowadays people sometimes separate their waste to make it easier for it().

A. 　Yes, please

B. 　 No, go ahead

C. 　 No, please don’t

D. 　 Yes, you’d better do

A. 　 has woken up

B. 　 is waking up

C. 　 will wake up

D. 　 wakes up

A. 　 hated

B. 　 employed

C. 　 disappointed

D. 　 visited

A. 　 needn’t

B. 　 couldn’t

C. 　 mustn’t

D. 　 wouldn’t

A. 　 talk

B. 　 say

C. 　 reply

D. 　 order

A. 　 seen

B. 　 realized

C. 　 shared

D. 　 developed

A. 　 standard

B. 　 problem

C. 　 reason

D. 　 purpose

A. 　 will be built

B. 　 will build

C. 　 was built

D. 　 built

A. 　磁场使人体内的分子重新排列

B. 　体温调节无法把热量散发出去

C. 　电场使人体内电解质离子发生移动

D. 　电磁场使体内的导电成分产生感应涡流