1：Can you come tommow?My teacher wants to know it.改为带有宾语从句的复

1：Can you come tommow?My teacher wants to know it.改为带有宾语从句的复合句
2：Has wendy handed in her application form?
I am not for sure.She told me that she wanted to check again and____it in soon.
A:will hand B:would hand C:has handed D:had handed
3:we will plant tress tomorrow and i dont know_____Tom will come and join us.
A:whether B:as C:that D:because
4:what_____they______when it beganto rain?
A do;do B:were;doing C:are;doing D;did;do