EXERCISE 14. MARK THE LETTER A, B, C OR D TO INDICATE THE SENTENCE THA...
140. Niggli first visited Viet Nam in 1999. He has been a generous sponsor of underprivileged Vietnamese children
since then. A. Before visiting Viet Nam in 1999, Niggli has been a generous sponsor of underprivileged
Vietnamese children.
B. Niggli has been a generous sponsor of underprivileged Vietnamese children since his first visit to
Viet Nam in 1999.
C. Niggli first visited Viet Nam in 1999 when he has been a generous sponsor of underprivileged
D. When he first visited Viet Nam in 1999, Niggli had been a generous sponsor of underprivileged
Vietnamese children.
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