_______they visited the Science Museum, they showed great interest in everything they saw.
| A．For the first time | B．At first |
| C．At the first time | D．The first time |
Bill was doing a lot of physical exercise to build up his______.
| A．ability | B．force | C．strength | D．mind |
Xi’an is ______ most beautiful tourist city and I believe I’ll come for _______ second time.
| A．the; a | B．a; a |
| C．the; the | D．a; the |
Mr. Wang, who _____ in this city ever since thirty years ago, _____ a report for the last two years.
| A．has lived; had prepared | B．has been living; has been preparing |
| C．lived; has been preparing | D．has been living; has prepared |
— Doesn't this bus go to the park?
— ________.
| A．Yes, we do | B．No, this is as far as we go |
| C．You’re welcome | D．I ‘m very sorry |
These are all ________houses for the homeless.
| A．newly - building | B．newly-builder |
| C．new - building | D．newly - built |