单项选择题

First of all, we applied ourselves to identifying the root cause of our national problems.（）

A．首先，我们致力于找出民族问题的根源。
B．起初，我们申请了研究民族问题。
C．首先，我们要了解民族问题存在的原因。
D．起初，我们应弄清民族问题的原因。

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热门试题

单项选择题

Just as any other vaccine, LYMErix may also have some side effects such as（）

A．backache
B．fever and coughing
C．stomachache
D．serious headache

单项选择题

It's indicated in the passage that something important should be known for us（）

A．if you live wherever there is Lyme disease
B．when you go out gardening or walking
C．if you are playing with your dog
D．when you are traveling around