21. It doesn’t make much of __________ difference whether he is in __________ favor of the proposal.
A. a; a B. /; a C. /; / D. a; /
22. We must never think that we are good at everything __________ others are good at nothing.
A. since B. however C. while D. as
23. - How much does a chef __________ in your country?
- Sorry, I don’t know exactly.
A. charge B. offer C. pay D. earn
