Three days after the aircraft went missing, an international effort ________ ships and planes hasn't found any wreckage, ________ growing frustration for the families of the 239 people on board.
| A．involved; causing | B．to involve; caused |
| C．involving; causing | D．involving; having caused |
All the neighbors admire this family, ________ the parents are treating their child like a friend.
| A．why | B．where | C．which | D．whose |
We have just heard a warning on the radio ________ an earthquake is likely to strike that area again.
| A．which | B．what | C．that | D．when |
. Stand over there ________ you’ll be able to see it better.
| A．or | B．while | C．but | D．and |
— Have you moved into the new house?
— Not yet. The rooms ________.
| A．are painting | B．are being painted | C．are painted | D．are being painting |
Living on Mars isn’t ________ as it sounds.
| A．as strange an idea | B．as idea strange |
| C．as a strange idea | D．as an idea strange |