I try to understand __________ that prevents so many Chinese from being as happy as one might expect.
—Have you found out the telephone number I need? —Yes,but ______,I have sit here for nearly a half hour.
I’d rather read than watch television;the programs seem ______ all the time.
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.