. I remember her face but I cannot _____ where I met her.
35. Clearly, in a system ______ every decision is made on the basis of tradition alone, it may be difficult to achieve progress.
34. It’s reported that in the past 50 years around 80 percent of Beijing’s courtyard houses ______.
33. If I_________you would drop in, I would have stayed home waiting for you.
32. ––When will you be back, Peter?––________a couple of days.
31. All books ______ to the library more than three days late will be subject to a fine.