He was lucky enough to be sent abroad to study for a business ________.
| A．requirement | B．qualification | C．permission | D．demand |
He told me that he had two girl-friends, and neither of _______ knew anything about the other.
| A．them | B．whom | C．which | D．who |
He told me that he had two girl-friends, neither of _______ knew anything about the other.
| A．whom | B．them | C．which | D．who |
He asked a lot of questions, and none of ______ was easy to answer.
| A．them | B．which | C．what | D．that |
He asked a lot of questions, none of ______ was easy to answer.
| A．which | B．them | C．what | D．that |
6. He had thousands of students, many of ______ gained great success in their own field.
| A．whom | B．them | C．which | D．who |