This math problem is as________as that one．I can’t work it out．
| A．difficult |
| B．more difficult |
| C．most difficult |
| D．the most difficult |
It is very kind _____ you to help me with my lessons. It is difficult _____me to learn them well.
| A．of , of | B． for , of | C．of , for | D．for , for |
－What would you like to drink ?
－It doesn’t matter. ________will do .
| A．Nothing | B．None | C．Something | D．Anything |
_______your history teacher_______ you ?
| A．Does, strict with | B．Does ; strict in |
| C．Is ,strict with | D．Is ; strict in |
－How many students watched the teacher carefully enough ?
－_________.
Nobody B. None C. Someone D. Some one
Some of my friends are interested in science，but none of them can tell
A when UFOs will appear next time B why do horses know the way
C where was this kind of plant found D how do elephants communicate