-- Can you keep an eye on my bag? I need to go to the washing closet.-- ________ . It'll be safe with me.
Had your father seen the doctor earlier, he ___.
Tom’s uncle must be an engineer, ___?
He ___ on the grass, looking at the clouds in the sky.
His mother ___ a lot of silkworms last summer.
You don’t __ to go there if you have no time.