Why _______ you leave with Lucas now? There are still two days left before you go to work and you can stay with us for more time.
—Does it rain a lot in this area?—______ ,it hardly ever rains; the climate is like that of a desert.
People in Sichuan Province are determined to rebuild ______ was destroyed in the earthquake.
It ______ a Saturday afternoon in May ______ Margaret could arrange for me to meet her elder sister.
The traffic problems we are looking forward to seeing ______ have attracted the government's attention.
—Who ______ it be that hasn't handed in his homework?—It ______ be Bob. He handed it in yesterday.