There are two rooms on the first floor, _____ is used as a guest room .
Mr Johnson preferred ______ heavier work to do.
Lily’s mobile phone was left in a taxi accidentally,never______again.
Hearing his words,I couldn’t decide ______or remain.
The man we followed suddenly stopped and looked as if ______ whether he was going in the right direction.
Tom pretended______it but in fact,he knew it very well.