James Smith and his girlfriend went to Chenyi Square to celebrate the New Year, never _________.
| A．returned | B．to return |
| C．returning | D．having returned |
—We were surprised to hear that the reason_______ she gave for her absence was______ her mother was ill.
—Yes，we saw her mother was at the supermarket that morning.
| A．why；that | B．which；that | C．that；because | D．why；because |
—I wonder what makes you a successful manager.
—I ________ as a waiter for five years，which contributes a lot to my today’s work.
| A．serve | B．have served | C．had served | D．served |
Due to the widespread ________ of this medical technology，more diseases can be discovered and treated at an early stage.
| A．presentation | B．application | C．qualification | D．appreciation |
The book was written ______ careful observations and detailed studies.
| A．on behalf of | B．regardless of | C．on the basis of | D．in relation of |
You had better ______some time every day for sports so that you can keep yourself energetic.
| A．set aside | B．take up | C．put away | D．give out |