i have fallen behind in my study,so i have got to___A.make an effort B.make efforts C.study hard D.make effort

i have fallen behind in my study,so i have got to___A.make an effort B.make efforts C.study hard D.make effort Dear I have fallen in love with I have fallen in love with I have fallen into the abyss likely , I have fallen behind in my study,so i have got to_____a.make an effort b,make efforts c.study hard d.make effort是不是选ABC啊 就D不行?不要查baidu噢 I feel that I have fallen love with you I find that,I have fallen in love with you I have fallen in love with you ,indeed i have fallen in love with you中文是什么意思 if i have not fallen in love with 翻译：I have already fallen in love you. i have already fallen in love with longdong是什么句型 I have fallen in love witn you是什么意思? Don't be discouraged ____you have fallen behind othersA.whether B.as if C.even if D.however he ___ . i saw him playing football on the playground just now.a.must have fallen ill d.may have fallen illc.can't have fallen illd.should have fallen ill写出原因! 几道高中英语单选,p191.I _____go there alone,but he ____go there by himselfa.dare,doesn't dare b.dare to,dares not c.dare,dare not d.dare to,doesn;t dare2.I have fallen behind in my study,so i have got to_____a.make an effort b,make efforts c. I can not stop myself,I have fallen in love with you! I find I have already fallen in love with her. 究竟是对还是错?