Freddy made up his mind to enjoy his singing and to ________ as many happy experiences as he could.
| A．develop | B．accumulate |
| C．calculate | D．process |
Doctors should take special care when treating children because their breathing rate is different from _____ of adults．
| A．that | B．those | C．some | D．one |
Most American cities are relatively small in terms of population when _____ with Chinese cities like Shanghai and Beijing．
| A．compare | B．comparing | C．compared | D．to compare |
The manager says he really can't _____ to wait another day, because he is so busy．
| A．waste | B．afford | C．spend | D．cost |
The famous reporter, who is said to have gone back to America last year, _____in China for almost twenty years．
| A．lived | B．was living | C．has lived | D．have been living |
The new method Mr．Wang has been devoted to _____ effective．
| A．is proved | B．to prove |
| C．being proved | D．proves |