A.keeping up | B.thinking up | C.getting across | D.getting off |
A.finding | B.found | C.being found | D.to be found |
A.having | B.to have | C.have | D.who have |
A.following, are allowed | B.followed, allow |
C.following, allowing | D.followed, have allowed |
A.how, to prevent | B.that, prevents | C. how, preventing | D.why, prevented |
A.believe | B.believing | C.believed | D.to believe |
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