11. The department secretary was ( ) the guest speaker at the station at 10 this morning, but the speaker's journey was canceled on a short notice.

29. The smartphone manufacturer blamed ( ) batteries for last year's humiliating recall of its flagship smartphone.

28. There is a strong ( ) between the father and the son.

27. You need to contact your doctor if the symptoms ( ) for a day.

26. I don't think that was a mistake; I think it was ( ) made so.

25. It is ( ) to keep a note of these important data, so we won't lose them.

24. The discovery of the New World is a ( ) in the world history.

23. This drink is very tasty, and it is nutritious as well, as it is ( ) with vitamin C.

22. Your earnings will be in ( ) to the amount of work you do.

21. nn hurried back, having a guilty ( ) at leaving her daughter at home alone.

20.Firms that use computers have found that the number of staff ( ) is needed for quality control can be substantially reduced.