Shelly prepared carefully for her English examination so that she could be sure of passing it at her first ______.
28.Mary felt__________from the outside world, since she lacked an Internet connection and couldn’t receive any e-mail.
27.How long do you think it will be________China becomes a rich and harmonious country?
26. If Tom’s wife doesn’t go to the party, _________.
25. You can put the medicine____you like, on condition that the children can’t reach it.
24. There were two boys in the lab,__________did the experiment successfully.