С.
choose the correct options.

1 all the staff think you shall / should apply for the new manager job.
2 may/ could you send in the next candidate, please?
3 i can't/ mustn't understanda thing sharon is saying.
4 i can see you're busy. shall / must i give pam a call for you?
5 having a new ceo must / may help the situation here at work.
6 the company shall/ might not invest in wek any more.
7 unfortunately. i can't/ couldn't make last tuesday's meeting.