Choosing a mobile phone for personal use is not an easy task because technology _____ so fast. [ ]

As the saying goes, “Only _____ to stop, can we smell the rose on the way.”

This is the most interesting book _____I have everread.

Sydney Opera House ______ a usual theatre and itsymbolizes Australia.

Jack said that he was sure of succeeding in passing the Totel Examination this time, _______, in my opinion, I don’t think so