The United States signed up on Friday for the 2010 Shanghai World Expo, _________ it the last major country to join the event．
| A．making | B．made | C．to make | D．having made |
News came from the office __________ Wang Lin had been admitted to Beijing University.
| A．that | B．what | C．which | D．where |
Among all the birthday gifts ______ a DIY card, which I like best.
| A．is included | B．include | C．were included | D．including |
___ you lose the paper document, sign in www. Sina.com, __ you might download all you need.
| A．If, which | B．So long as, what | C．In case, where | D．Even if, as |
I have heard a lot of good things about you I came back from abroad.
| A．since | B．until | C．before | D．when |
He wrote a letter ______ he explains what had happened in the accident.
| A．what | B．which | C．where | D．how |