I shall never forget those years ________ I lived on the farm with the farmers.
答案
when 句意：我永远也不会忘记和农民们一起住在农场的那些年。years是表示时间的名词，且从句中不缺少主语或宾语，故用when引导定语从句，when在从句中作时间状语。
Now that energy prices are rising so rapidly, further prices are very uncertain, and the risk _____ a new investment depending on them may fail is greater.
A．that B．by which C．at which D．in that
I talked to the girl ______car had broken down in front of the shop.
A. who B. her C. whose D. which
The couple _____ photo I took at the party were very pleased with it.
A. whose B. who C. which D. what
Thousands of African-Americans cheered Obama’s being elected American President in the streets on November 4th 2008, many of ________ even cried with joy.
A. those B. them C. whom D. which
Venus has a dense atmosphere, _____ we know very little.
A. its composition B. whose composition
C. about which composition D. about whose composition
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