28. At a rough look, the area of the city is about ______ the old one.
| A．three times the size as | B．three times the size of |
| C．three times that is | D．three times what is |
I'll be busy on ________ Sunday morning, and perhaps I'll have ________ late night.
| A．the; a | B．/; a |
| C．/; the | D．the; / |
It is high time that we started to consider what ________ we should take to reduce heavy smog caused by traffic fumes and other pollutions.
| A．affection | B．attention |
| C．measures | D．advantages |
________ walk is expected to last all day, so bring ________ packed lunch.
| A．A; a | B．The; / |
| C．The; a | D．A; / |
In recent years, many mainland residents have rushed to Hong Kong to buy baby milk powder due to their ________ about its quality.
| A．anxiety | B．curiosity |
| C．generosity | D．attention |
One hundred thousand years ago, ________ choice was simple when it came to ________ drink—there was no choice. It was water or nothing.
| A．the；a | B．a；不填 |
| C．the；不填 | D．a；the |