A warning signal suddenly appeared on the screen of my computer, ______ the computer was being attacked by a certain virus.
| A．indicated | B．indicating |
| C．to indicate | D．having indicated |
The school canteen has announced that some new dishes will become _____ to our students.
| A．academic | B．available |
| C．attractive | D．psychological |
As a class teacher, I don’t really approve ________.
| A．students to have long hair |
| B．students had long hair |
| C．of students to have long hair |
| D．of students having long hair |
Don't stop ________ you meet with a word you don't understand.
| A．at the time | B．each time |
| C．by the time | D．Sometimes |
I would appreciateif you can keep an eye on my dog while I am away.
| A．you | B．that | C．不填 | D．it |
The boy failed four times, but he said he would try ___________.
| A．a five time | B．a fifth time |
| C．the five time | D．the fifth time |