25. The pen I _____ I_______ is on my desk, right under my nose.
A. think...lost B. thought...had lost
C. think...had lost D. thought...have lost
26. ______ at the top of the Oriental Tower, people below will look very small.
11．Stand B. Standing C. To stand D. If you stand
【答案】D
【解析】
试题分析：考查句子成分：句意：如果你站在Oriental塔顶，下面的人会看起来很小。这句话的主语是people below，但是前面的动作stand不是people below发出的，所以不能用非谓语动词做状语，应该是条件状语从句，选D。
考点：考查句子成分
27. _____ from other continents for millions of year, Australia has many plants
and animals not found in any other country in the world.
A. Being separated B. Having been separated
C. Having separated D. To be separated
