27．The students wonder______ good the course will do to their future jobs．
| A．which | B．what | C．whether | D．Why |
Last month, part of Southeast Asia was struck by floods, from _____ effects the people are still suffering．
| A．that | B．whose | C．those | D．what |
________ many times, he finally understood it．
| A．Told | B．Telling | C．Having told | D．Having been told |
He told us whether _________ a picnic was still under discussion
| A．to have | B．having | C．have | D．had |
David threatened_______ his neighbour to the police if the damages were not paid．
| A．to be reported | B．reporting |
C．to report | D．having reported |
Ladies and gentlemen, please remain __________ until the plane has come to a complete stop．
| A．seated | B．seating | C．to seat | D．seat |