1.we are in a difficult position in ___we have few people pr

1.we are in a difficult position in ___we have few people properly qualified for this work.
1.we are in a difficult position in ___we have few people properly qualified for this work.
a.this b.what c.that d.where
2.the news said that he got the first prize,___he felt impossible.
a.this b.which c.that d.what
3.tom ___have missed the class without asking the teacher for leave.
a.needn't b.wouldn't c.shouldn't d.couldn't