Teachers have to constantly update their knowledge in order to maintain their professional________. (2011·江苏，27)
| A．consequence | B．independence |
| C．competence | D．intelligence |
---I heard Back Street Boys will sing at the New Theater.
---Where did you ________?
| A．pick that up | B．put that up | C．make that up | D．take that up |
—Did you visit the famous museum?
—No. We ________ it, but we spent too much time shopping.
| A．could have visited | B．must have visited |
| C．can’t have visited | D．shouldn’t have visited |
Jim talked for about half an hour yesterday. Never ______ him talk so much.
| A．I heard | B．did I hear | C．I had heard | D．had I heard |
Maria has to baby-sit．That’s＿＿＿ she can’t come out with us．
| A．why | B．how | C．when | D．what |
Paris is ＿＿＿ most beautiful city，where you can see＿＿＿ famous Eiffel Tower．
| A．a；the | B．a; 不填 | C．the；a | D．不填；the |