The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.?

A. before       B. until          C. after     D. since

The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.?

A. before           B. until            C. after         D. since

The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.?

A. before       B. until          C. after     D. since

The meeting was expected to start at 9 o'clock but the manager didn't turn up ________ twenty minutes later.

A．before B．until

C．after D．since

The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.

1. A.
   before
2. B.
   until
3. C.
   after
4. D.
   since