Try____ she might, Sue couldn’t get the door open.
| A．if | B．when | C．sine | D．as |
Scientists still wonder ______ cloning will help or harm us and _____ it is leading us.
| A．that; what | B．whether; where |
| C．if; that | D．whether; how |
After the National Entrance Examination the students will have an anxious couple of weeks _____ for the results.
| A．wait | B．to be waiting | C．waiting | D．waited |
Then came the disturbing news ______ Dolly had become seriously ill.
| A．how | B．why | C．whether | D．that |
Would it be ___ for you to pick me up at four o’clock and take me to the airport?
| A．free | B．empty | C．handy | D．convenient |
Students should be encouraged to use _____ Internet as _____ resource.
| A．不填；a | B．不填; the | C．the; the | D．the; a |