While he_____ on the phone, a man walked into hisroom.

It is almost five years__________ we saw each other last time.

Shall we go for a picnic tomorrowafternoon—_____ It’s said that there might be aheavy rain then．

Sally _____ a very interesting country. She often gets up _____ night.

16.You can’t imagine that a well-behaved gentleman__________be so rude to a lady.