dùng under trong trường hợp nào?
Choose the best answer for the following sentence:
Our company is ______________ contract to supply enough materials for them to produce.
A: in
B: under
C: from
D: on
Choose the best answer for the following sentence:
Our company is ______________ contract to supply enough materials for them to produce.
A: in
B: under
C: from
D: on