Tom is not _______ he was in the situation _______ he was pessimistic.

Xiao Ming practises his spoken English once there is a chance and that is_________ it takes to live his dream to be a good guide．

The present question is ____ many students consider it impossible ____ is really possible if effort is made.

—We were surprised to hear that the reason_______ she gave for her absence was______ her mother was ill.—Yes，we saw her mother was at the supermarket that morning.

 —I prefer shutting myself in and listening to music all day on Sundays.— That’s _________ I don’t agree. You should have a more active life.