Question 1:
"Hi, Jenny. Have you heard from our supplier yet? No? OK, well, please keep me ....... as to whether they have*^*resolved their transportation problem and whether they will be able to deliver the raw materials on time," Martin*^*said on the phone.
A. posted
B. focused
C. engaged
D. a part of

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English Slang Idioms (120) | C1 – Advanced