— It was great to see you again.
— ______ .
| A．I’ll catch up with you |
| B．Be sure to keep in touch |
| C．Try to hold on |
| D．You’re getting ahead of yourself |
---I will have to think about it again．
--- If you _, you may lose the opportunity to compete altogether．
| A．hesitate | B．wonder | C．continue | D．fail |
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 |