________its low cost, the appeal of iron asa building material lies in its strength, its resistance to fire, and itspotential to span long distances.

“I have received a lot of letters of support, all ______ me to focus on my music,” said Liu Wei, whowas an armless pianist and named one of the show’s winners in “China’s Got Talent” competition. [ ]

They ___________to put their hearts into study..

Why didn’t you go to the party last night — I __________.

is not far from Stratford, so you can easily visit ________ in a day.