She is only a child, so there is no need ______ her so much stress.

He works harder than my son .

Shelly had prepared carefully for her biologyexamination so that she could be sure of passing it on her first_________.

was ________ by the salesman whose products turned out to be much less effective.

With the help of the foreign experts, theyproduced ___ washing machines in 2003 as the year before.