1 . Success ______ happens overnight, for it requires persistence and constant efforts.

A．occasionally

B．randomly

C．frequently

D．rarely

2 . 根据句意，选择下列单词填空，注意使用正确形式，其中有2个词为多余词。

creative, fortune, occasion, approach, appeal, range, reflect

1. With the final exam ____________, all the students are revising their lessons.
2. The national park has a large collection of wildlife, ____________ from butterflies to elephants．
3. Mrs Southern listened carefully, breaking in with some questions ____________.
4. ____________ , the rescue team arrived in time and helped the workers out of the mine.
5. Any given culture is a ___________ of the politics and economics of a given society．

3 . 用方框中单词的适当形式完成下列句子，每个单词只能用一次。

graduate   contribute   produce   science   demand   recycle   occasional

1. I have so many great memories, but one particular occasion is the day of my ________ .
2. Climbing is physically ________ .
3. Einstein was awarded the Nobel Prize for his ________ to Quantum Theory.
4. ________ we go out to restaurants, but mostly we eat at home.
5. Plastic bottles can be ________ into clothing.
6. The country is totally self-sufficient in food ________.
7. If you do something in a ________ way, you do it carefully and thoroughly, using experiments or tests.

4 . Don't worry. Buses run_________between the city and the airport, so you will catch the next soon.

A．frequently	B．occasionally
C．permanently	D．significantly