We used to see each other       , but I haven’t head from him since last year.

In our life, one question that ____ comes up is:“to be or not to be?”

—What do you think of the speech?     —The speaker said ___ nothing worth ___

He was __ twenty when he was gone.

Some people are bad at recalling names and faces, so it's possible that they have a condition called face blindness, ______ people suddenly have trouble recognizing family members, friends or even themselves．