Ⅰ. Vocabulary.（根据句意及首字母和汉语提示写单词。）
1. It's r (有危险的) to swim in the ocean when the warning flags are up.
2. Our maths teacher always encourages us to use c (好奇心) to find problems around us.
3. The weather in spring is c (易变的), so we should take a jacket to school.
4. You can s (仅仅) ask the teacher for help when you can't work out the problem by yourself.
5. The Great Wall is a great w (奇观) of the world, and I hope to visit it one day.

1. risky 2. curiosity 3. changeable 4. simply 5. wonder

()1. Deserts are mostly made of sand. Only a few plants and animals can live in the difficult .

A.stages
B.blocks
C.communities
D.conditions

1.D

()2. What useful advice Jenny gave to me! I finished my learning project on time.

A.successfully
B.nervously
C.differently
D.unfortunately

2.A

()3. —Do you know that China is one of in the world?
—Yes, I do. It’s much older than the USA.

A.the oldest country
B.older country
C.the oldest countries
D.older countries

3.C

()4. —Do you know who broke the glass?
—Sorry, I don't know. , who is the owner of the broken glass?

A.After all
B.In fact
C.On the whole
D.By the way

4.D

()5. —How was your trip to Tianzhu Mountain, Fuxing? —.

A.Of course I did
B.It was rainy and cold
C.It was great
D.I stayed at home

5.C