监理工程师对承包单位作业活动质量的检查是在( )的基础上进行的。
A.建设单位认可
B.质监单位签认
C.承包单位自检并确认合格
D.设计单位签认
参考答案:C
5. --- Why didn’t Tom give you one of his paintings?
--- I didn’t want one, but he would have given me one if I______.
A.did
B.would
C.will
D.Had
注意缺陷障碍伴多动好发于学龄前期儿童。