he said he would ring me up, but he didn’t ___my telephone number?

1. A.
   Has he forgotten
2. B.
   Must he forget
3. C.
   Must he have forgotten
4. D.
   Could he have forgotten

Surely he __ have forgotten about the wedding! But he has to put business first.

A. needn't       B. mustn't          C. can't     D. shouldn't 

Surely he ____ have forgotten about the wedding! But he has to put business first.

  A. needn’t                 B. mustn’t                    C. can’t                        D. shouldn’t

he said he would ring me up, but he didn’t ___my telephone number?

A. Has he forgotten   B. Must he forget    C. Must he have forgotten   D. Could he have forgotten

He          have forgotten to pay before he was stopped by the store keeper.

A．should      B．could        C．must        D．would