once you ____ a promise,you must carry it out.
one you ___ a promise,you must carry it out.
A.have made B.had made C.made D.is making
但是按照主将从现得原则,应该选C才对啊,
they can't leave until they have done their work.
这句话中的have done是不是也要根据主将从西现得原则改为finish或者do呢？