. Busy as he is, he ________ a few hours a week for physical exercise.
A. set off B. set about C. set aside D. set away
He was once turned down by a primary school for lack of ________ practical teaching experience. But now he has turned out to be one of ________ best teachers in the city.
A. a; a B./; the C. the; the D. a; the
It could take 4-6 months before the first batch（批）of vaccines （疫苗）are available to fight A/H1N1 flu ________ as swine flu, WHO officials said.
A. known B. to know C. knowing D. having known
Young people tend to get up very late unless ________ to rise early.
A. required B. requiring C. they were required D. to require
No reader ________ take away a book from the library without the permission of the librarian.
A. need B. might C. shall D. will
. --Did you see ________ may be the longest total solar eclipse （日全食）in 500 years yesterday?
--No, it was cloudy above my city at that time.
A. what B. that C. who D. all
