Only ______according to the directions can the medicine be quite effective.
| A．taking | B．taken | C．being taken | D．having been taken |
Officials believe that more than one person _____ for the big fire.
| A．is to be blamed | B．should blame |
| C．should be blaming | D．is to blame |
While cleaning the snow on the road, _________.
| A．a wallet was found on the ground. | B．a wallet appeared on the ground. |
| C．I found a wallet lying on the ground. | D．I found a wallet laid on the ground. |
--- Did you understand what the teacher said ?
---Yes! She explained the text in detail to make her lessons __________.
| A．easy understood | B．easily to understand |
| C．easily understood | D．easy understand |
We appreciate the notice that you_____ the mistakes we made in newspapers.
| A．paid | B．paid to | C．took | D．took of |
He was __ with the results of the exam, which can be seen from his __ smile.
| A．satisfied, satisfying | B．satisfied, satisfied |
| C．satisfying, satisfied | D．satisfying, satisfying |