________ the tower building，where you can see the whole city

_______ the tower building，where you can see the whole city．

_______ the tower building，where you can see the whole city．

1. A.
   Standing on the top of
2. B.
   If you climb to
3. C.
   When you reach the top of
4. D.
   Get to the top of

Directions： Complete the following passage by filling in each blank with one word that best fits the context.

Travel is a very good activity. When traveling, you can relax 1.________， forget your tiredness or troubles, and have the energy to take on the new tasks waiting for you.

But sometimes traveling is not 2.________ enjoyable thing. For example, the weather can be changeable. If you climb a mountain, it may rain suddenly. You may be caught  3.________ the rain and may catch a cold. The  4.________ thing is that you may have your money stolen  5.________ you may have an injury. All these terrible things are  6.________ can happen to you.

Therefore, when you are going on a trip, you must make a good preparation. Firstly, you must have clear information about the weather. 7.________， you should choose a good companion so that you can help each other. Thirdly, you must be careful enough and try to avoid accidents. 8.________ you do this, you will surely enjoy your travel.

_______ the tower building，where you can see the whole city．