She __________ be here. I saw her come in.

---I think her dress comes from the 1970s.---It _______be from that time. The dress looks so modern.

 Thanks to his pension, Li Zhentian, _____ give each of his grandchildren RMB 5 as a Chinese New year gift for the first time.

.--- Excuse me. Is this the right way to the Summer Palace? --- Sorry, I am not sure, but it _____ be .

—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?     —_______ my students have a try?