Qian Xuesen devoted all his life to ________________ China’s Space Program.
| A．develop | B．developing | C．developed | D．develops |
The children ______ not to play with the fire.
| A．are often told | B．tell | C．are telling | D．told |
With the help of the computer, information can ____every corner of the world swiftly.
| A．get | B．reach | C．arrive | D．return |
---You seem to like sweets.
---_______ .That’s probably why I’m becoming fatter and fatter.
| A．So I do | B．So do I | C．So am I | D．So I am |
---I’m sorry to have kept you waiting long.
---Never mind. I ____ here for only a few minutes.
| A．have been | B．have come | C．have arrived | D．waited |
---Will you be back ____ five in the afternoon?
---I’m not sure, maybe later than that.
| A．in | B．before | C．for | D．until |