Ifyouhaveanyproblemsduringyourstudyhere,pleasedonot_______tocallmeforhelp

IntheUnitedStates,theforeignpolicyisdecidedbythe________government,notbyeachstate.

Although the trffic is not busy, he likes to drive at a_______ speed.

Sometimes it is very difficult to _______ some of the English words. Even the native speaker can not help.

He always has a lot of _______ ideas in his mind , and sometimes we do not even know what he is thinding about.