— How is your father feeling at present?— He __ quite fine after the operation, but unluckily he is taking a turn for the worse today.
29. Reading offers only material of knowledge, without thinking, however, it’s hardly possible to make ______ we read ours.
28. We have gathered nearly 100,000 quilts, ____ up to half have gone to the flooded-hit areas.
27. They’re arguing on who, on earth, is known for the great discovery ______ penicillin, an effective bacteria killer.
26. -Do you know what Miss Black does for a living?-I have no idea at all, I think she could be _______ but a singer.
25. These two countries are similar ______ they both have a high snowfall during winter.