The children all turned ____ the famous actress as she entered the classroom. 
| A．looked at | B．to look at |
C．to looking at | D．look at |
A new kind of drug ___ ___ to cure H7N9 bird flu by the scientists and they are hopeful that they will succeed in a couple of weeks.
| A．has been developed | B．is being developed | C．is developing | D．has developed |
Yangzhou high school ___________ since 1902.
| A．has come into existence | B．has been existed | C．has been in existence | D．began to exist |
Tom is similar ____ height ____ Peter though they are of different ages.
| A．to, in | B．to, to | C．in, in | D．in, to |
You don’t necessarily have to own _____ latest everything, but you should have _____rough idea of what is changing.
| A．the; a | B．a; 不填 | C．不填; the | D．the; the |
When ________ different cultures，we often pay attention only to the differences .
| A．compared | B．being compared | C．comparing | D．having compared |