Now teachers tend to be more dependent on ________ is thought to be a great teachingaid — the computer.
| A．that | B．which |
| C．what | D．it |
________from the top of the tower，the south foot of the mountain is a sea of trees.
| A．Seen |
| B．Seeing |
| C．Having seen |
| D．To see |
The engine just won’t start. Something seems ________ wrong with it.
| A．to go |
| B．to have gone |
| C．going |
| D．having gone |
My sister，as well as her classmates who ________ late for class，________ criticized by Mr.Hunt.
| A．were；was |
| B．was；were |
| C．was；was |
| D．were；were |
His purpose ________ going to the US is ________ for his uncle.
| A．of；looking |
| B．in；looking |
| C．in；to look |
| D．of；to look |
The scientist________ the behavior of the mice after they were given the drug.
| A．looked |
| B．observed |
| C．noticed |
| D．watched |