In the English Grammar Profile, there are two points in the category of Modality at B2 which are practically the same.
Point 147 is:
‘must’ the question form.
Point 161 is:
‘must’ to ask about obligation and necessity.
For example:
I began to wonder, why must it be so binary?
What sort of talents must we be sure to defend?
An iWeb cluster search for must * * * * ?
1 MUST BE GOOD , RIGHT ? 84
2 MUST BE TRUE , RIGHT ? 76
3 MUST BE BETTER , RIGHT ? 45
4 MUST BE A BETTER WAY ? 26
5 MUST BE DOING SOMETHING WRONG ? 20
must _p _vvi
1 MUST I USE 186
2 MUST I TAKE 173
3 MUST I PAY 166
4 MUST I GO 154
5 MUST I WAIT 143
6 MUST WE WAIT 131
7 MUST YOU USE 107
8 MUST I SAY 100
9 MUST YOU GO 99
10 MUST WE GO 96
11 MUST YOU TAKE 87
12 MUST WE TAKE 78
13 MUST I PROVIDE 75
14 MUST WE SAY 75
15 MUST I COMPLETE 73
16 MUST WE BELIEVE 72
17 MUST I SUBMIT 66
18 MUST I MAKE 65
19 MUST YOU MAKE 65
20 MUST WE FORGET 63
21 MUST WE THINK 61
22 MUST I KEEP 56
23 MUST WE MAKE 56
24 MUST I GET 52
25 MUST THEY THINK 52
26 MUST I GIVE 51
27 MUST I TELL 51
28 MUST I REGISTER 50
29 MUST WE USE 50
30 MUST YOU PAY 50
31 MUST YOU KEEP 49
32 MUST I BUY 48
33 MUST I PUT 48
34 MUST I FILE 47
35 MUST I MEET 46
36 MUST IT FEEL 46
37 MUST WE GIVE 45
38 MUST I THINK 43
39 MUST I BRING 42
40 MUST I CHANGE 42
41 MUST I REMIND 42
42 MUST YOU KNOW 42
43 MUST I DIE 41
44 MUST I LEAVE 40
45 MUST I LIVE 40
46 MUST WE KEEP 39
47 MUST WE CONTINUE 38