21 In many places in China, ______ bicycle is still ______ popular means of transportation.
A a, the B \, a C the, a D the, the
22 My clock is out of ______ and waked me up at 3 this morning.
A range B repair C reach D order
23 We must be practical and ______ the cost ______ we make a decision.
A turn out, before B work out, before C figure out, until D come true, until
