be to be done可以改成must be done all goverment loans are to br repaid可不可以改成 all goverment loans must be repaid

be to be done可以改成must be done all goverment loans are to br repaid可不可以改成 all goverment loans must be repaid
be to be done可以改成must be done
all goverment loans are to br repaid可不可以改成 all goverment loans must be repaid

be to be done可以改成must be done all goverment loans are to br repaid可不可以改成 all goverment loans must be repaid
应该不行吧 因为be to do表示将来的动作 而must没有突出“将”而是必须 我觉得应该不行

to be 表示将要
must表示必须