题目内容
Experts say ________ to sunlight for too much time will do harm to one’s skin.
| A．exposed | B．having exposed | C．being exposed | D．exposing |
C
解析试题分析：句意：专家说暴露在阳光下太多的时间会损害人的皮肤。考查动名词做主语，而又是皮肤被暴露在阳光下，being exposed是exposing的被动形式，exposed是过去分词多作定语或状语，having exposed作状语，表示动作在先。故选C。
考点: 考查非谓语动词的用法。
Jack became seriously ill after ________ in polluted air for many years.
| A．breathed | B．breath | C．breathing | D．to breathe |
You can use a large plastic bottle, cut off, as a pot to grow flowers in.
| A．the top is | B．with its top | C．whose top | D．the top of which |
——How wise of you to come round，but why？
——______ that all is right.
| A．See | B．To see | C．Seeing | D．For seeing |
With a lot of difficult problems _ , the manager felt like a cat on hot bricks.
| A．settled | B．settling | C．being settled | D．to settle |
In the reading room, we found her____ at a desk, with her attention____ on a book.
| A．sitting; fixing | B．to sit; fixed | C．seating; fixing | D．seated; fixed |
________ many times, he still repeated the same mistake.
| A．Having been told | B．Having told | C．Telling | D．Told |
This machine is very easy______. Anybody can learn to use it in a few minutes.
| A．operating | B．to be operating | C．operated | D．to operate |
If ____unsolved, the problem of food safety may lead to more serious results.
| A．left | B．making | C．remained | D．taking |