_____ scores of times , but he still couldn’t understand it ．
| A．Having explained | B．Having been explained |
| C．Though it was explained | D．It was explained |
-----“What did he ask you?”
-----“_____ I would be late.”
| A．That | B．When | C．Where | D．Whether |
He had a lot of friends, but none of _____ could lend him any money.
| A．whom | B．them | C．which | D．who |
_____ when one loses freedom does one know its value.
| A．Just | B．Only | C．Even | D．Ever |
He had a lot of friends, none of _____ could lend him any money.
| A．whom | B．them | C．which | D．who |
What do you suppose _____ him think so?
| A．to make | B．making | C．to have made | D．made |