题型:填空题 The factory produces half a million pairs of shoes every year, _____ 80% are sold abroad. [ ]A. of which B. which C. of them D. of that 查看答案
题型:填空题 Hardly _______________ when we were told to stop.A.did we beginB.had we begunC.were we beginningD.were we to begin 查看答案