Experiments of this kind in both the U．S．and Europe well before the Second World War．
| A．have conducted | B．have been conducted |
| C．had conducted | D．had been conducted |
It is generally considered unwise to give a child _____ he or she wants .
| A．however | B．whatever |
| C．whichever | D．whenever |
The old man watched the young boys playing _______ basketball with _______great interest .
| A． a ; a | B．the ; the |
| C．/ ; / | D．/ ;a |
China ________ the developing countries in the world .
| A．is belonged | B．is belonging to |
| C．is belonged to | D．belongs to |
We regret ______ that the film was not worth _________.
| A．to say; to see | B．to say; seeing |
| C．saying; to see | D．saying; seeing |
She thought I was talking about her daughter , _____, in fact , I was talking about my daughter .
| A．whom | B．where | C．which | D．while |