Whose purse is it —If it isn’t yours, it must be _________.

You should have gone to see the film It’s very moving —______, we arrived too late to catch the last bus

e it or not My grandpa , 95 yearsold now, ________World WarⅡ

The officer gave orders that anyone _____ a gun shouldbe reported to the police station.

Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine