The first decade in the 21st century _______ the rapid rise of China as a world economic power.
| A．witness | B．has witnessed | C．will witness | D．have witnessed |
-- When do you need to pay the balance?
-- ______ December 31.
| A．In | B．By | C．During | D．Within |
. I think ______ information of this kind is help when you look for a job.
| A．不填; a | B．the; a | C．an; a | D．the; 不填 |
________ your composition carefully, some spelling mistakes can be avoided.
| A．Having checked | B．Check |
| C．If you check | D．To check |
She is in a poor ___________ of health, which worries her mother much.
| A．position | B．situation |
| C．state | D．condition |
-I really appreciate ____________ to holiday with you on this nice island.
—It's my pleasure.
| A．have time | B．having time |
| C．to have time | D．to having time |