21．The combination of parties to form a new government tried out to be
______ failure, but as we know, success often comes from _____ failure．
A．a; a B．/; / C．a; / D．/ ; a
22．The manager and general engineer _____ very strict _____ his employees and ____ his work as well．
A．is; with; in B．are; with; in C．is; with; with D．are; in; in
