11. We wouldn’t lose courage even if we ______ again.
A. were to fail B. would fail
C. fail D. have failed
12. It is most important that one of the brakes on your bicycle ______ properly.
A. will work B. has worked
C. works D. work
13. These factories are ______ to the foreign trade company.
A. subsidiary B. coordinate
C. substantial D. substantive
14. Let’s sing together, ______ ?
A. will you B. shall we
C. won’t you D. shan’t we
15. If you don’t pay your bill, they will ______ your gas.
A. send B. frustrate
C. discourage D. disconnect
