We have to finish so much work within two days. We can’t __________ to waste any time.

All the preparations for the task _____, and we’re ready to start.

I took the wrong train .I didn’t even know it until half an hour later. [ ]

Don’t be late. There______aclassmeetingthisafternoon.

Why didn’t you _____ the guests some tea at first?– But they said they didn’t like it.