In this exercise I have to choose the best answer. Could you check them. Thanks
1. The supplies were ordered were not the ones we received.
A. You should changing, suppliers.
B. You ought to change supplies.
C. You had better supplies.
D. You might want to change the supplies.
MY ANSWER IS B
2. The wait staff has broken dozens of glasses.
A. They must be more careful!
B. They’d better carefully do it!
C. You might want to tell them to be more careful!
D. They should more careful!
MY ANSWER IS C
3. There have been a lot of complaints.
A. We ought not look into it.
B. we would better look into it.
C. We had better look through it.
D. We’d better look into it.
MY ANSWER IS D
1. I don't see any correct answer among those choices.
I agree with your choices for 2 and 3.