The man to whom we handed the forms pointed out that we had not _________ filled in

We can’t go abroad this year, so we will have to_____ ourselves with a holiday in Shanghai.[ ]

Excuse me， how can I get to the post office—Go the bridge and turn left. Walk the museum， and you’ll see it.

When you go outing with your sisters, you must see to ________ that they are safe.[ ]

He constantly gets into awkward and absurd situations, ____ audience can be greatly amused.