(2013·浙江，11)Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.
| A．these | B．some |
| C．ones | D．those |
—Will Thursday or Friday __________ you?
—Either will __________
| A．fit； be |
| B．fit； OK |
| C．suit； all right |
| D．suit； do |
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's no use __________ without taking action.
| A．complain |
| B．complaining |
| C．being complained |
| D．to be complained |
Even the best writers sometimes find themselves __________ for words.
| A．lose |
| B．lost |
| C．to lose |
| D．having lost |
I am afraid he's more of a talker than a doer, which is __________ he never finishes anything.
| A．that |
| B．when |
| C．where |
| D．why |