If Li Lei __________ tomorrow, I’ll call him.[ ]

Yesterday I didn’t _____ any seals but _____ some dolphins.

.Why __________ put the meat in the fridge ? It’ll stay fresh for several days.

She looks sad. Do you know why?—Her son went to study in Canada. I think she _________ him.

When did you become a volunteer for the elderly?– Two years ago. I this group since then.