The manager ____ nothing about the matter ____ he read his secretary’s report.

A. had known, when         B. has known, before  C. will know, after  D. knew, until

The manager ____ nothing about the matter ____ he read his secretary’s report.

1. A.
   had known, when
2. B.
   has known, before
3. C.
   will know, after
4. D.
   knew, until

The manager ____ nothing about the matter ____ he read his secretary’s report.

A. had known, when     B. has known, before     C. will know, after       D. knew, until

 The manager ____ nothing about the matter ____ he read his secretary’s report.

A. had known, when     B. has known, before  C. will know, after  D. knew, until

The manager ____ nothing about the matter ____ he read his secretary’s report.