He hurried to the school only _______ thecampus was empty ___ it was Sunday!

To keep safe _____ an earthquake, you should remain at a spot in your room where nothing may fall on you[ ]

One reason why he succeeds is ______he is good at thinking in different ways.

We____here two hours ago . So we___ _here for twohours .

The customs office isyour luggage is inspected when you enter or leave a country