Either you or he _____ interested in playing chess. _____ you or he fond of music at present?

He got his first book published It turned out to be abestseller—When was ________—______ was in 2000 when he was still in college

There is no doubt _______international cooperation is the key to dealing with cyber crime.

What about the rent —______. You can pay weekly or monthly.

Can you give me some advice about the design?—I think it should_____ to all ages and social groups.[ ]