Totellyouthetruth,youplan----tobeimprovedfurther.A.needB.keptC.mustD.remains

Question

To tell you the truth,you plan ----to be improved further.
A.need
B.kept
C.must
D.remains

Answer 1

To tell you the truth,your plan remains to be improved further.
首先,kept肯定不对,无需用过去式；
must 是助动词,后面用不定式to肯定不对,直接用 must be improved 就可以了；
need 最容易混,但是需要用第三人称单数；
所以,剩下的就是D了.