You've made great progress in your studies of Engl
A. remains to do B. is remained to do C. remains to be done D. is remained to be done
D. is remained to be done ·············
C. remains to be done /////////////
答案应该是C! remain不用被动,但这句话有被动含义,所以do后应该加被动, so:remains to be done is all right!
答：答案选 ,done,said,etc.有这个解释我们可以判定remain本身就表示被动了,所以不能再用被动语态,所以选项B、D排除。在这个句子里much时代词,...详情>>
答：是两个有助于糖尿病治疗化合物 它们能恢复肥胖和糖尿病实验小鼠的正常葡萄糖水平和正常的胰岛素活动，并降低了脂肪肝疾病发生的风险。详情>>
