It is generally believed that teaching is _____ it is a science[ ]

When did your cousin arrive Shenzhen— He got to the airport the morning of the 28th November.

Tom was deeply ______ by the story ofthe hero. Which of the following is NO Tright? [ ]

It was ______ the old clock that the old manspent the whole morning at home

You often talk with your classmate on thetelephone or mobile phone— _____． I like usingQQ．