21．We’ve had a good start, but next, more work needs _____to achieve the final success. A．being done B．do C．to be done D．to do 22．The newcomer went to the library the other day and searched for he could find about Mark Twain. A．wherever B．however C．whatever D．whichever 23．—Shall I _____ the raincoat? —No hurry. Leave it _____ it is. It looks like rain. A．put away; in the place B．put away; where C．put on; where D．put on; there 24．Many people feel nervous _____ they attend a concert, so I recommend _____ the hall early to have enough time _____ yourself comfortable. A．at the first time, arriving, to make B．the first time, to arrive, making C．for the first time, reaching, making D．the first time, getting to, to make
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