1. —Has Mary come back yet?
—Yes.She has got many books from her elder schoolmates，which ____ 1,000.
A．add up B．add up to C．add to D．add
2. Our bodies are strengthened by taking exercise. ，our minds are developed by learning.
A．Probably B．Likely C．Similarly D．Generally
3. You can hardly imagine the difficulty the man had smoking.
A．given up B．giving up C．to give up D．give up
4. The girl left a special impression on the teachers in the contest, because she had a(n) _________ voice.
A. standard B. original C. distinctive D. obvious
