What caused the fire— ______.

lthough he didn’t mention any names,everyone knew _____ he was _______.

In a __________ ,we can read many kinds ofbooks ,but you must keep quiet there.

We are planning to have a casual get-together thisSaturday or Sunday Are you coming—______ I’ve got rather a busy day this weekend

Do you really think I can achieve my goal ? — Absolutely .___ you give up halfway