In order to find the missing child, villagers all they can over the past five hours.
A. did B. do C. had done D. have been doing
You can change your job, you can move house, but friendship is meant to be life.
A. of B. on C. to D. for
I remembered the door before I left the office, but forgot to turn off the lights.
A. locking B. to lock C. having locked D. to have locked
Interest is as to learning as the ability to understand, even more so.
A. vital B. available C. specific D. similar
—May I help you? You seem to be having some problems.
— , thanks. I think I can manage.
A. All right B. No problem C. It’s all right D. There’s no way
Carl is studying food science at college and hopes to open up meat processing factory of his own one day.
A. / ; a B. / ；the C. the; a D. the; the
