单项选择题
A．自知道吸烟有害以来，世界政府就应该采取严厉的禁烟措施。 B．因为吸烟有害处，世界政府就应该开展严肃的禁烟运动。 C．既然吸烟有害，各国政府就应该开展严肃的禁烟运动。 D．由于吸烟有害，各国政府开展了严肃的禁烟运动。
We have little chance to discuss problem with the teach...
单项选择题We have little chance to discuss problem with the teachers concerned or to do more than glance at the books being used（）
A．我们没有多少机会同有关老师讨论问题，或者不仅仅是对正在使用的书粗看一下。 B．我们几乎没有机会同有关老师讨论问题，对于在使用的书最多也只能扫视一下。 C．我们有些机会就老师关心的问题进行讨论，对于正在使用的书也看得比较多。 D．我们没什么机会就关心的问题与老师讨论，对于正在使用的书。
The special-effects person's job is important because（）...
单项选择题The special-effects person's job is important because（）
A．she reduces the costs of movie making B．she makes scenes look real C．she makes destroyed things reusable D．she protects their work from being destroyed
A U.S. military airplane followed the boat because（） A．...
单项选择题A U.S. military airplane followed the boat because（）
A．the boat was on a dangerous voyage B．the boat was from an enemy country C．the boat looked like a ship from an unknown country D．it was the effect that the director wanted
