The teacher came into the classroom _______ by his students.
| A．following | B．to be following | C．followed | D．having followed. |
The band was very successful in the seventies, most of
members were in their twenties.
| A．its | B．whose | C．whom | D．which |
He told me the information everybody here could be paid well the next year.
| A．whenever | B．whoever |
| C．that | D．whichever |
Some of the people often ask the same question the air has been polluted.
| A．whether | B．if | C．that | D．where |
Do you have any idea that makes The Voice of China so popular?
| A．what is it | B．what it is |
| C．how it is | D．how is it |
He came here in the hope he could learn about the cause of the accident.
| A．which | B．how | C．that | D．what |