It was a time_______ the killer whaleshelped the whalers catch the baleen whales.

The school aims to _____ the amount(数量) of time spent on arts and science subjects.[ ]

Man _____ die without air or water.

You _______ help your parents do some housework, they are tired.

I don’t mind what time tomorrow you arrive at my place ___________ you promise to come and help me.[ ]