We must limit the expense         what we can afford.

    A. of           B. on           C. at               D. to

We must limit the expense         what we can afford.[来源:学*科*网Z

    A. of           B. on           C. at               D. to

We must limit the expense         what we can afford.[来源:学*科*网Z

    A. of           B. on           C. at               D. to