After so many hardships, the scientist his motherland at last.
| A．set on his foot | B．set foot on | C．set feet on | D．set his feet on |
The police set about arresting the suspect ______ they found enough evidence to prove him guilty.
| A．immediate | B．as long as | C．the moment | D．as far as |
Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.
| A．normal; common | B．usual; ordinary | C．common; usual | D．ordinary; normal |
After being elected ______ President of ________ United States, Barack Obama moved with his family into ________ White House.
| A．/; the; / | B．/; the; the | C．the; /; / | D．/; an; the |
I took it _____ that he would be glad to accept my invitation, but he didn’t at all.
| A．for sure | B．for certain | C．for granted | D．for example |
The lady in red immediately became the _____ of attention when she entered the hall.
| A．combination | B．account | C．confusion | D．focus |