Mr. Smith, _____ of the ______ speech, started to read a novel.
| A．tired; boring | B．tiring; bored |
| C．tired; bored | D．tiring; boring |
It was April 29, 2011_____ Prime William and Kate Middleton walked into the palace hall of the wedding ceremony.
| A．that | B．when | C．since | D．before |
The Nile River ____ flood large areas but now the water ____ produce electricity.
| A．used to; is used to | B．used to; used to |
| C．was used to; is used to | D．was used to; used to |
So difficult ____that no one could ___ a good solution to it.
| A．was the problem; come up with |
| B．the problem was; come up with |
| C．the problem was; put up with |
| D．was the problem; put up with |
When we arrived, she went straight to ___ kitchen and started to prepare ___ meal for us.
| A．the; a | B．/; a | C．the; / | D．a; the |
____they decide which college to go to, students should research the admission procedures.
| A．Once | B．While | C．Until | D．As |