--When did you become a volunteer for the elderly?
-- Two years ago. I this group since then.
| A．joined | B．took part in |
| C．have joined | D．have been in |
They are late. The film __________ for five minutes.
| A．has begun | B．has started | C．has been on | D．began |
Mr. Green _______ to Beijing two weeks ago. He ______ there many times.
| A．has gone; has been | B．went; has been | C．has gone; went | D．went; went |
-----What’s the population_______the U.S.A.?
----- the U.S.A.has _______population of 297 million.
A. of, a B. of, / C. in, a D.in, /
of the teachers in our schoolwomen.
| A．Two thirds, are | B．Two threes , is | C．Two third, are | D．Two thirds , is |
----- Which is your favorite sport, swimming, running or skating?
------_______ of them. I like water skiing best.
| A．None | B．Neither | C．All | D．Either |