1．I have difficulty working out the problem.Can you help__________(solve) it?
2．The thunder and lightning stopped，but it continued to__________(pour)．
3．We're teaching the little boy how to__________(tie) a shoelace(鞋带)．
4．She's__________(terrify) that her mother might find out her secret.
5．The trees gave some__________(shelter) from the rain.
6．The murderer has been arrested，which makes people not__________(panic) any longer.
7．He's always__________(lie) so nobody around him believes him.
8．I lay in bed shaking with__________(fright) after seeing the terrible accident.
9．Dogs are believed to be our true__________(companion)．
10．The boy was too young to give a correct__________(account) of the stranger he met.
