unit:41 why because

1_________ is mum so irritable?

 
2Probably _________ she is very busy these days.

 
3I don't understand _________ you are so nervous. the test is very easy.

 
4_________ do you think my watch is slow? it is 3.15 now, not 3.10

 
5My mother usually goes shopping in the aftemoon _________ she has a lot of housework to do in the morning.

 
6_________ do you never invite your friends for dinner?

 
7_________ I hate cooking.

 
8I wonder _________ Jack always refuses my help

 
9I don't know _________ she is so rude to her parents.