Professor Li, who I ____ abroad, still teaches in Peking University.
| A．think went | B．think to have gone | C．thought went | D．thought had gone |
Please keep ______; I’m taking a photo of you all. Say “Cheese”.
| A．calm | B．still | C．quiet | D．silent |
. Just like a voyage at sea, our life journey, ______ time is limited, is full of difficulties as well as opportunities.
| A．what | B．of which | C．while | D．whose |
— How could they keep us waiting for so long?
— They got on the bus half an hour ago and they ________ be here in ten minutes, I think.
| A．might | B．would | C．should | D．must |
_______ fashion differs from country to country results from cultural diversities in the world. 
| A．What | B．That | C．This | D．Which |
— Would you like to join us in a field trip this weekend?
— I’d like to. But I can’t ______ the time because I have an important exam to take on Monday.
| A．kill | B．take | C．afford | D．spend |