When it comes to “empty-nest syndrome(综合症)”, parents are advised to _______regular contact with children through phone calls, emails, texts or video chats.
28.“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.”
27. “Shall Mary come and play computer games?” “No, _______ she has finished her homework.”
26. The visitor asked to have his picture taken _______ stood the famous tower.
25. “I’m going to the post office.” “_______ you’re there, can you get me some stamps?”
24. “May I go and play with Dick this afternoon, Mum?” “No, you can’t go out _______ your work is being done.”