A.looking | B.looked | C.look | D.to be looked |
A.To provide | B.Be provided | C.Having provided | D.Providing |
A.Being located | B.Located | C.locating | D.To be located |
A.Waiting | B.To wait | C.Having waited | D.To have waited |
A.on finishing | B. finishing | C.to finish | D.at finishing |
A.improve | B.improved | C.improving | D.improvement |
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