(2013·宁夏银川一中高三第四次考试)________ scores of times, but he still couldn’t understand it

.They turned out more than 1,000 washing machines, most of which ________quality

There is _______ 11-meter-long bridge over______ river.

eter fix the computer himself—He _______,because he doesn’t know muchabout computers.

I ______ my English teacher since I left university.