.In the open boat,the four men,____was a doctor,met with a storm a tsea.
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.
Only those who have experienced hardship ______ well aware of what happiness means.
Even on a cold day he prefers ______ out to play football ______ at home.