1． ---Shall we go out for an outing this weekend?
---Oh, with all this work _____, I don't know if I'll have time to go out.
A. to do B. doing C. done D. being done
2． Sam couldn't _____ how to print out the document until the teacher showed it to him.
A. carry out B. take out C. figure out D. turn out
3． Most of the Europeans refuse to accept GM food ___ Americans regard it as the fruit from high tech.
A. when B. as C. while D. the moment
