13. Don’t worry! I’ll _____ his safety.

You look nice in the dress!.— Thank you. It ______ me seven hundred yuan. I like its design.

Why didn’t you warn them of the danger ahead?—But what otherwise? They never listen to me. [ ]

The woman pulled her hat low down ____ her eyes in order not to be recognized by the angry crowds.[ ]

There are more than fifty _________ in our school.