The doctor told me to take the medicine .
| A．every fourth hours | B．each fourth hour |
| C．each four hours | D．every four hours |
They produced two reports, ______ of which contained any useful suggestions.
| A．neither | B．either | C．all | D．none |
—How is your recent trip to Sichuan?
—I’ve never had ______ one before.
| A．a more pleasant | B．a pleasant |
| C．a most pleasant | D．the most pleasant |
The flowers ______ sweet in the botanic garden attract the visitors to the beauty of nature.
| A．smelling | B．smelt | C．to smell | D．to be smelt |
The ______ boy was last seen ______ near the gate of the park.
| A．missed, playing | B．missing, play | C．losing, to be playing | D．lost, playing |
I’ve always treasured the watch______ to me on my eighteenth birthday.
| A．gives | B．given | C．to be given | D．being given |