People in Chongqing feel the air here is better than _____ in Beijing.
| A．it | B．the other | C．that | D．the one |
Susan, ______ university student from Europe, teaches me ______ art in her spare time.
| A．an; 不填 | B．a; the | C．a; 不填 | D．an; the |
These young people are now making an active ______ to beautify our city.
| A．part | B．effort | C．decision | D．plan |
--- My son is lost. Did you see a boy pass by here?
--- I saw ______ boy hidden behind ______ tree over there. You may go and have a look.
| A．a; the | B．不填；the | C．a; 不填 | D．a; a |
The need for an operation，especially an immediate operation， almost always comes as a ______ to the patient and his family.
| A．result | B．happiness | C．disappointment | D．shock |
--- Look! I’ve bought ______ new pen.
--- What ______ beautiful pen! It in particular seems nice.
| A．the; a | B．不填; a | C．a; a | D．a; the |