说明理由

说明理由
1.We wish the job _____ more quickly,but we had some difficulty in getting the right kind of supplies.
A.be done B.could have been done C.could be done D.may have been done
2.He wouldn't have tripped over the step if he ______ where he ______ then.
A.looked,were going B.had looked,had gone C.were looking,had been going D.had been looking,was going
3.______,we should have gone on a trip to the mountain.
A.But for the fact that the weather was bad
B.If the weather were not bad
C.Because of the bad weather
D.Whether the weather being bad or not