He spent________money on books and________his books are about space and satellite.
| A．a great deal of；a good many of |
| B．a good many；a great number of |
| C．a large quantity of；a large amount of |
| D．a lots of；plenty of |
.
Most girls prefer nice clothes________ nice food.
| A．of | B．for | C．with | D．to |
.
Clearly, in a system ______________ every decision is made on the basis of tradition alone, it may be difficult to achieve progress.
| A．that | B．when | C．where | D．which |
.
It's reported that in the past 50 years around 80 percent of Beijing's courtyard houses ___________.
| A．had wiped out | B．have wiped out |
| C．had been wiped out | D．have been wiped out |
.
If I ___________ you would drop in, I would have stayed home waiting for you.
| A．have known | B．knew | C．would know | D．had known |
.
—When will you be back, Peter?
—___________ a couple of days.
| A．On | B．In | C．For | D．By |