I haven’t decided _____ hotel to stay at.
| A．which | B．what | C．at which | D．where |
Exploring ________space is exciting, yet dangerous. There is ________need for both robots and humans for space exploration.
| A．the; a | B．a; a | C．/; a | D．/; the |
My mother has always_______we eat every healthily.
| A．make sure | B．made sure | C．be sure | D．sure |
One of the advantages of living on the top floor of a highrise is that you can get agood _______.
| A．sight | B．scene | C．look | D．view |
Listen to the two girls by the window. What language _________?
| A．did they speak | B．were they speaking |
| C．are they speaking | D．have they been speaking |
The country life he was used to_________ greatly since 1992.
| A．change | B．has changed | C．changing | D．have changed |