. The latest job report gave a mixed picture of employment in the US, leaving investors without any clear sign ________ the economy is improving.
A. which B. that C. what D. if
Every child is ________, with their own needs, preferences and talents.
A. original B. contradictory（对立的）
C. similar D. unique
So far only four of the 77 Chinese children who went missing from a home in Britain last month ________, according to The Guardian.
A. have found B. found C. have been found D. were found
. 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
