A.do | B.have to | C.have to speak | D.must to |
A.will build | B.will be built | C.would build | D.would be built |
A.is playing | B.was playing | C.played | D.had played |
A.have been put up | B.were put up | C.had put up | D.put up |
A.was sent up | B.is sent up | C.have been sent up | D.has been sent up |
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