－Mary，how did your Math test go?
－I had thought I _________，but in fact I came in the top 10 in my class.
| A．should have failed |
| B．couldn’t have failed |
| C．have failed |
| D．shouldn’t have failed |
The boy ________ a strange disease is trying to live a normal life.
| A．suffered | B．suffered from | C．suffering | D．suffering from |
It was in 1969 ________ two Americans went to the moon by spaceship.
| A．when | B．that | C．at that time | D．just then |
When I came ________ with the teenager hidden in the cave, I was surprised to find him ________ covered with dust.
| A．face-to-face; entirely | B．face to face; entire | C．in face of; completely | D．face to face; entirely |
You can never imagine what great difficulty I had ________ his parents.
| A．to find | B．of finding | C．finding | D．about finding |
One of the engines of the plane was out of order and the bad weather ________ the difficulty.
| A．added to | B．added up | C．added up to | D．added |