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
