I ______ to help you to do homework but I couldn’t spare any timeI ______ a composition last night and I’ll finish it tomorrow

This group ______ nearly 18 percent of the state’s population,are living in a remote area,which fewpeople know about. [ ]

There are a small number of people involved，possibly ________ twenty

Eating less meat is good _____ your highblood pressure(高血压).

Tom is __________ clever __________ he can answer all the questions．