Mr. Obama paid a visit to China in November, 2009, _______, needless to say, must strengthen the Sino-US ties.
| A．what | B．that | C．which | D．it |
He spoke about the country as if he had been there, but ________ he had never.
| A．frequently | B．gradually | C．actually | D．finally |
Her friend did everything in his ________ to help with her business.
| A．energy | B．power | C．strength | D．force |
________ large number of people think ________ truth has been hidden on purpose.
| A．A; / | B．The; / | C．A; the | D．The; the |
This is the only way we can imagine him out of his foolish plan.
| A．persuading | B．to persuade | C．persuaded | D．persuade |
--- When did you come back?
---- An hour ago．Youthe computer games.
| A．have played | B．were playing | C．played | D．had played |