At the last place Gary worked,they-----an annual company pic

題目：

At the last place Gary worked,they-----an annual company picnic.All the employess----bring their families along and spend the day at a near by park.It was great A.had to have;had to B.used to have;couldn't C.would have;didn't have toD.used to have;would求英語高手解析!

解答：

D 在Gary最後工作的地方公司每年都會一次野餐,used to have表示過去常常有,所有的員工都將會帶著他們的家人一起,would表示過去將會