An early typewriter produced letters quickly and neatly; the typist, _____ couldn't see his work on his machine.
| A．however | B．therefore | C．yet | D．although |
Excuse me. II was blocking your way.
| A．didn’t realize | B．don’t realize |
| C．haven’t realized | D．wasn’t realizing |
When you are at home，give a call to let me know yousafely．
| A．are arriving | B．have arrived |
| C．had arrived | D．will arrive |
The form cannot be signed by anyoneyourself.
| A．rather than | B．other than | C．more than | D．better than |
After studying in a medical college for five years, Jane ______ her job as a doctor in the countryside.
| A．set out | B．took over | C．took up | D．set up |
The English spoken in the United States is only slightly different from ______ spoken in England.
| A．which | B．what | C．that | D．the one |