He is in deep sorrow, so it is not a(n)        time to mention the subject.

Her ________ look suggested that she was very _______ with the answer.

What makes the space shuttle      is that it takes off like a rocket but lands like an airplane．

Although it is _____ to watch programs on TV sometimes, I think people shouldn’t spend all the time watching it.

— Jack has spent an hour in the shoe shop．Hasn't he decided which pair of shoes to buy?
— Maybe．Young as he is, he is         about his appearance．

Please remember to remind them that the products inside are ________ and must be handled with great care.

What moved us most was that some ordinary people volunteered to help those ______ in the storm in Beijing.

If you tend to regularly suffer from a certain symptom like headache, be sure to keep in store the
       medicine to take care of the issue as soon as it starts.

Philosophical problems arise when people ask questions that, though very        , have certain characteristics in common.

As we all know, typing is a ___job to a__ heart.
A tired ，tired             B. tired ，tiring  C.tiring，tired    D. tiring，tiring