Other genetic similarities suggested they all ________ a single, common ancestor about 300 years ago.
| A．had | B．have had | C．have | D．had had |
_______by the noise, they had to finish the meeting early.
| A．Being disturbed | B．Disturbed |
| C．Disturbing | D．Having disturbed |
.His life was devoted to _____the poor out.
| A．helping | B．help | C．being helped | D．having helped |
He escaped from death, because he changed his plan _____ the last minute.
| A．at | B．in | C．for | D．on |
– She isn’t feeling very well today.
---You’re right. ______ to have caught cold.
| A．It appears | B．It appears that |
| C．She appeared | D．She appears |
Seeing from the foot of the mountain, clouds are seen beautifully ____over its top.
| A．hung | B．hanged | C．hanging | D．being hung |